Aftermath of the 2016 United Kingdom European Union membership referendum

On 27 June, Chancellor of the Exchequer George Osborne attempted to reassure financial markets that the British economy was not in serious trouble. This came after media reports that a survey by the Institute of Directors suggested that two-thirds of businesses believed that the outcome of the referendum would produce negative results as well as falls in the value of sterling and the FTSE 100. Some British businesses had also predicted that investment cuts, hiring freezes and redundancies would be necessary to cope with the results of the referendum.[28] Osborne indicated that Britain was facing the future "from a position of strength" and there was no current need for an emergency Budget.[29] "No-one should doubt our resolve to maintain the fiscal stability we have delivered for this country ... And to companies, large and small, I would say this: the British economy is fundamentally strong, highly competitive and we are open for business."[30]

On 14 July Philip Hammond, Osborne's successor as Chancellor, told BBC News the referendum result had caused uncertainty for businesses, and that it was important to send "signals of reassurance" to encourage investment and spending. He also confirmed there would not be an emergency budget: "We will want to work closely with the governor of the Bank of England and others through the summer to prepare for the Autumn Statement, when we will signal and set out the plans for the economy going forward in what are very different circumstances that we now face, and then those plans will be implemented in the Budget in the spring in the usual way."[31]

On 12 July, the global investment management company BlackRock predicted the UK would experience a recession in late 2016 or early 2017 as a result of the vote to leave the EU, and that economic growth would slow down for at least five years because of a reduction in investment.[32] On 18 July, the UK-based economic forecasting group EY ITEM club suggested the country would experience a "short shallow recession" as the economy suffered "severe confidence effects on spending and business"; it also cut its economic growth forecasts for the UK from 2.6% to 0.4% in 2017, and 2.4% to 1.4% for 2018. The group's chief economic adviser, Peter Soencer, also argued there would be more long-term implications, and that the UK "may have to adjust to a permanent reduction in the size of the economy, compared to the trend that seemed possible prior to the vote".[33] Senior City investor Richard Buxton also argued there would be a "mild recession".[34] On 19 July, the International Monetary Fund (IMF) reduced its 2017 economic growth forecast for the UK from 2.2% to 1.3%, but still expected Britain to be the second fastest growing economy in the G7 during 2016; the IMF also reduced its forecasts for world economic growth by 0.1% to 3.1% in 2016 and 3.4% in 2017, as a result of the referendum, which it said had "thrown a spanner in the works" of global recovery.[35]

On 20 July, a report released by the Bank of England said that although uncertainty had risen "markedly" since the referendum, it was yet to see evidence of a sharp economic decline as a consequence. However, around a third of contacts surveyed for the report expected there to be "some negative impact" over the following year.[36]

In September 2016, following three months of positive economic data after the referendum, commentators suggested that many of the negative statements and predictions promoted from within the "remain" camp had failed to materialise,[37] but by December, analysis began to show that Brexit was having an effect on inflation.[38]

In April 2017 the IMF raised their forecast for the British economy from 1.5% to 2% for 2017 and from 1.4% to 1.5% for 2018.[39]

Prime Minister David Cameron announces his resignation following the outcome of the referendum

On 24 June, the Conservative Party leader and prime minister, David Cameron, announced that he would resign by October because the Leave campaign had been successful in the referendum.[40] Although most of the Conservative MPs on both sides of the referendum debate had urged him to stay, the UKIP leader, Nigel Farage, called for Cameron to go "immediately".[41] A leadership election was scheduled for 9 September, with the new leader to be in place before the party's autumn conference on 2 October.[42] The two main candidates were predicted to be Boris Johnson, who had been a keen supporter of leaving the EU, and Home Secretary Theresa May, who had campaigned for Remain.[43] The last-minute candidature by Johnson's former ally Michael Gove destabilised the race and forced Johnson to stand down; the final two candidates became May and Andrea Leadsom.[44][45] Leadsom soon withdrew, leaving May as new party leader and next prime minister.[46] She took office on 13 July.[47]

The Labour Party leader Jeremy Corbyn faced growing criticism from his parliamentary party MPs, who had supported remaining within the EU, for poor campaigning,[48] and two Labour MPs submitted a vote of no confidence in Corbyn on 24 June.[49] It is claimed that there is evidence that Corbyn deliberately sabotaged Labour's campaign to remain part of the EU, despite remain polling favourably among Labour voters.[50] In the early hours of Sunday 26 June, Corbyn sacked Hilary Benn (the shadow foreign secretary) for apparently leading a coup against him. This led to a string of Labour MPs quickly resigning their roles in the party.[51] By mid-afternoon on 27 June 2016, 23 of the Labour Party's 31 shadow cabinet members had resigned from the shadow cabinet as had seven parliamentary private secretaries. On 27 June 2016, Corbyn filled some of the vacancies and was working to fill the others.[52]

According to a source quoted by the BBC, the party's Deputy Leader Tom Watson told leader Jeremy Corbyn that "it looks like we are moving towards a leadership election." Corbyn stated that he would run again in that event.[53] A no confidence motion was held on 28 June 2016; Corbyn lost the motion with more than 80% (172) of MPs voting against him with a turnout of 95%.[54]

Corbyn responded with a statement that the motion had no "constitutional legitimacy" and that he intended to continue as the elected leader. The vote does not require the party to call a leadership election[55] but, according to The Guardian: "the result is likely to lead to a direct challenge to Corbyn as some politicians scramble to collect enough nominations to trigger a formal challenge to his leadership."[56] By 29 June, Corbyn had been encouraged to resign by Labour Party stalwarts such as Dame Tessa Jowell, Ed Miliband and Dame Margaret Beckett.[57] Union leaders rallied behind Corbyn, issuing a joint statement saying that the Labour leader had a "resounding mandate" and a leadership election would be an "unnecessary distraction". Supporting Corbyn, John McDonnell said, "We're not going to be bullied by Labour MPs who refuse to accept democracy in our party."[58]

On 11 July, Angela Eagle announced her campaign for the Labour party leadership after attaining enough support of MPs to trigger a leadership contest, saying that she "can provide the leadership that Corbyn can't".[59] Eagle subsequently dropped out of the race (on 18 July) leaving Owen Smith as the only contender to Jeremy Corbyn.[60]

Smith had supported the campaign for Britain to remain in the European Union, in the referendum on Britain's membership in June 2016.[61] On 13 July 2016, following the vote to leave the EU, three weeks prior, he pledged that he would press for an early general election or offer a further referendum on the final 'Brexit' deal drawn up by the new prime minister, were he to be elected Labour leader.[62]

Approximately two weeks later, Smith told the BBC that (in his view) those who had voted with the Leave faction had done so "because they felt a sense of loss in their communities, decline, cuts that have hammered away at vital public services and they haven't felt that any politicians, certainly not the politicians they expect to stand up for them..." His recommendation was to "put in place concrete policies that will bring real improvements to people's lives so I'm talking about a British New Deal for every part of Britain..."[63]

The Lib Dems, who are a strongly pro-European party, announced that they respect the referendum result, but would make remaining in the EU a manifesto pledge at the next election.[64] Leader Tim Farron said that "The British people deserve the chance not to be stuck with the appalling consequences of a leave campaign that stoked that anger with the lies of Farage, Johnson and Gove."[64]

In reaction to the lack of unified pro-EU voice following the referendum, members of the Liberal Democrats and others discussed the launch of a new centre-left political movement.[65] This was officially launched on 24 June as More United, named after a line in the maiden speech of Labour MP Jo Cox, who was killed during the referendum campaign.[66] More United is a cross-party coalition, and will crowdfund candidates from any party who support its goals, which include environmentalism, a market economy with strong public services, and close co-operation with the EU.[67]

The UK Independence Party was founded to press for British withdrawal from the EU, and following the referendum its leader Nigel Farage announced, on 4 July, that having succeeded in this goal, he would stand down as leader.[68] Following the resignation of the elected leader Diane James, Farage became the interim party leader on 5 October.[69] Farage's successor Paul Nuttall was elected the party leader on 28 November 2016.[70]

Under the Fixed-term Parliaments Act 2011, the next general election was scheduled to be held on 7 May 2020.[73]

Following the referendum, some political commentators argued that it might be necessary to hold an early general election before negotiations to leave began.[74] The final two candidates in the Conservative Party leadership election – Andrea Leadsom and Theresa May – said they would not seek an early general election.[75][76] However, after Leadsom's withdrawal and with May thus due to become prime minister without any broader vote, there were renewed calls for an early election from commentators[77] and politicians. Tim Farron, leader of the Liberal Democrats, called for an early election shortly after Leadsom's withdrawal.[78]

Despite repeatedly previously ruling out an early general election, May announced on 18 April 2017 her intention to call an election on 8 June 2017. This required a two-thirds super-majority of the Commons in support of a motion for an early general election, which was agreed on 19 April. May stated that "division in Westminster will risk ability to make a success of Brexit and it will cause damaging uncertainty and instability to the country... We need a general election and we need one now, because we have at this moment a one-off chance to get this done while the European Union agrees its negotiating position and before the detailed talks begin. I have only recently and reluctantly come to this conclusion."[79]

The snap election resulted in an unexpected hung parliament, with the Conservatives losing their overall majority but remaining as the largest party, which led to further political turmoil.

Numerous pressure groups were established after the referendum to oppose Brexit.[80]

A week after the referendum, Gordon Brown, a former Labour prime minister who had signed the Lisbon Treaty in 2007, warned of a danger that in the next decade the country would be refighting the referendum. He wrote that remainers were feeling they must be pessimists to prove that Brexit is unmanageable without catastrophe, while leavers optimistically claim economic risks are exaggerated.[81]

The previous Labour prime minister, Tony Blair, in October 2016 called for a second referendum, a decision through parliament or a general election to decide finally if Britain should leave the EU.[82] Former leader of the Conservative prime minister John Major argued in November 2016 that parliament will have to ratify whatever deal is negotiated and then, depending on the deal there could be a case for a second referendum.[83]

To what extent free movement of people would or would not be retained in any post-Brexit deal with the EU has emerged as a key political issue. Shortly after the result, the Conservative politician Daniel Hannan, who campaigned for Leave, told the BBC's Newsnight that Brexit was likely to change little about the freedom of movement between the UK and the European Union, concluding "We never said there was going to be some radical decline ... we want a measure of control."[85][86][87][88]

Theresa May stated in August 2016 that leaving the EU 'must mean controls on the numbers of people who come to Britain from Europe but also a positive outcome for those who wish to trade goods and services'.[89][90] According to a Home Office document leaked in September 2017, Britain plans to end the free movement of labour immediately after Brexit and introduce restrictions to deter all but highly skilled EU workers. It proposes offering low-skilled workers residency for a maximum of two years and the highly skilled work permits for three to five years.[91]

Boris Johnson initially argued that restricting freedom of movement was not one of the main reasons why people have voted Leave, but his position was seen as too lax on the issue by other Conservative Party Leave supporters, which may have contributed to Michael Gove's decision to stand for the party's leadership contest.[92] Meanwhile, EU leaders warned that full access to the single market would not be available without retaining free movement of people.[93] Limitations on the free movement of EU citizens within the UK will also have consequences for research and innovation. While campaigning in the Conservative leadership contest, Gove pledged to end the freedom of movement accord with the EU and instead implement an Australian-style points system.

Natasha Bouchard, the Mayor of Calais, suggests that the government of France should renegotiate the Le Touquet treaty, which allows British border guards to check trains, cars and lorries before they cross the Channel from France to Britain and therefore to keep irregular immigrants away from Britain.[94][95] French government officials doubt that the trilateral agreement (it includes Belgium) would be valid after the UK has officially left the European Union and especially think that it is unlikely that there will be any political motivation to enforce the agreement.[96] However, on 1 July 2016 François Hollande said British border controls would stay in place in France, though France suggested during the referendum campaign they would be scrapped allowing migrants in the "Jungle" camp easy access to Kent.

In late July 2016, discussions were underway that might provide the UK with an exemption from the EU rules on refugees' freedom of movement for up to seven years. Senior British government sources confirmed to The Observer that this was "certainly one of the ideas now on the table".[97] If the discussions led to an agreement, the UK – though not an EU member – would also retain access to the single market but would be required to pay a significant annual contribution to the EU. According to The Daily Telegraph the news of this possibility caused a rift in the Conservative Party: "Tory MPs have reacted with fury ... [accusing European leaders of] ... failing to accept the public's decision to sever ties with the 28-member bloc last month."[98]

According to CEP analysis of Labour Force Survey, immigrants in the UK are on average more educated than UK-born citizens. Citizens in the UK are concerned that immigrants are taking over their jobs since most immigrants are highly educated, however, they are actually helping the economy because they too consume goods, and produce jobs.[99] Immigrants to the UK help to mitigate the negative effects of the ageing British labour force and are believed to have an overall net positive fiscal effect. Some have argued that immigration has a dampening effect on wages due to the greater supply of labour.[100] However, other studies suggest that immigration has only a small impact on the average wage of workers. Immigration may have a negative impact on the wages of low-skilled workers but can push up the wages of medium- and highly paid workers.[101]

There were about 3.7 million EU citizens (including Irish) living in the UK in 2016 and around 1.2 million British citizens living in other EU countries.[102] The future status of both groups of people and their reciprocal rights are the object of Brexit negotiations.[103] According to the British Office for National Statistics, 623,000 EU citizens came to live in England and Wales before 1981. A further 855,000 arrived before the year 2000. As of 2017, approximately 1.4 million Eastern Europeans were living in Britain, including 916,000 Poles.[104] In May 2004, when the EU welcomed ten new member states from a majority of Central and Eastern European countries, the UK was one of only three EU member states, alongside Sweden and Ireland, to open their labour market immediately to these new EU citizens.[102][105] In the 12 months following the referendum, the estimated number of EU nationals immigrating to the UK fell from 284,000 to 230,000. In parallel, the number of EU citizens emigrating from the UK increased from an estimated 95,000 in the year before the vote to 123,000. Annual net immigration from the EU to the UK has, thus, fallen to about 100,000.[102]

Theresa May, when candidate for Conservative leader, suggested that the status of EU immigrants currently in the UK could be used in negotiations with other European countries, with the possibility of expelling these people if the EU does not offer favourable exit terms.[106] This position has been strongly rejected by other politicians from both Remain and Leave campaigns.[103] In response to a question by Labour Leave campaigner Gisela Stuart, the Minister for Security and Immigration James Brokenshire said that the Government was unable to make any promises about the status of EU citizens in the UK before the government had set out negotiating positions, and that it would seek reciprocal protection for British citizens in EU countries.[107]

The Vice-Chancellor of Germany, Sigmar Gabriel, announced that the country would consider easing citizenship requirements for British nationals currently in Germany, to protect their status.[108] The foreign ministry of Ireland stated that the number of applications from British citizens for Irish passports increased significantly after the announcement of the result of the referendum on the membership in the European Union.[109][110] The Irish Embassy in London usually receives 200 passport applications a day, which increased to 4,000 a day after the vote to leave.[111] Other EU nations also had increases in requests for passports from British citizens, including France and Belgium.[111]

Cornwall voted to leave the EU but Cornwall Council issued a plea for protection of its local economy and to continue receiving subsidies, as it had received millions of pounds in subsidies from the EU.[112]

After the referendum, leading scientists expressed fear of a shortfall in funding for research and science and worried that the UK had become less attractive for scientists.[113] The British science minister, Jo Johnson said the government would be on the watch for discrimination against British scientists, after stories circulated about scientists being left out of joint grant proposals with other EU scientists in the aftermath of the referendum.[114] On 15 August 2016, ministers announced that research funding would be matched by the British government.[115]

In October 2016, government ministers announced that the UK would be investing 220 million pounds ($285 million) in support of the nation's technology industry.[116] The consequences of Brexit for academia will become clearer once negotiations for Britain's post-Brexit relationship with the EU get under way.

The European Union Youth Orchestra announced in October 2017 that, as a result of Brexit, it intends to relocate from London to Italy. It is expected British youth will cease being eligible to participate in the orchestra in future.[117]

As of January 2018, the European Commission had announced that three European agencies would be leaving the UK as a consequence of its withdrawal from the EU: the European Medicines Agency, European Banking Authority and the Galileo Satellite Monitoring Agency.

The United Kingdom and the Republic of Ireland are members of the Common Travel Area, which allows free movement between these countries. If the UK negotiates a settlement with the EU that does not involve freedom of movement, while the Republic of Ireland remains an EU member, an open border between the Republic and Northern Ireland is likely to become untenable.[118] Martin McGuinness, deputy First Minister of Northern Ireland, said this would "seriously undermine" the Good Friday Agreement that brought an end to the Troubles.[119] David Cameron pledged to do whatever possible to maintain the open border.[120] Since becoming prime minister Theresa May has reassured both Northern Ireland and the Republic of Ireland that there will not be a "hard (customs or immigration) border" on the island of Ireland.[121]

The most likely way that exit from the EU is activated is through Article 50 of the Treaty on European Union. The British government chooses when to invoke, although theoretically the other members of the European Union could refuse to negotiate before invocation.[122] This will be the first time that this article has been invoked. The government can theoretically ignore the result of the referendum.[123]

Although Cameron had previously announced that he would invoke Article 50 on the morning after a Leave vote, he declared during his resignation that the next prime minister should activate Article 50 and begin negotiations with the EU.[124] During the Conservative leadership contest, Theresa May expressed that the UK needs a clear negotiating position before triggering Article 50, and that she would not do so in 2016.[125] The other 27 members of the EU issued a joint statement on 26 June 2016 regretting but respecting Britain's decision and asking them to proceed quickly in accordance with Article 50.[126] This was echoed by the EU Economic Affairs Commissioner Pierre Moscovici.[127] However, with the next French presidential election being held in April and May 2017, and the next German federal election likely to be held in autumn 2017, "people close to the E.U. Commission" were reported as saying that the European Commission was at the time working under the assumption that Article 50 notification would not be made before September 2017.[128]

On 27 June 2016, a "Brexit unit" of civil servants were tasked with "intensive work on the issues that will need to be worked through in order to present options and advice to a new Prime Minister and a new Cabinet",[129] while on 14 July, David Davis was appointed to the newly created post of Secretary of State for Exiting the European Union, or "Brexit Secretary", with a remit to oversee the UK's negotiations for withdrawing from the EU.[130] Davis called for a "brisk but measured" approach to negotiations, and suggested the UK should be ready to trigger Article 50 "before or by the start of" 2017, saying "the first order of business" should be to negotiate trade deals with countries outside the European Union. However, Oliver Letwin, a former Minister of State for Europe, warned the UK had no trade negotiators to lead such talks.[131]

Having previously ruled out starting the Article 50 process before 2017,[131] on 15 July 2016, following a meeting with Scottish First Minister Nicola Sturgeon, May said that it would not begin without a coherent "UK approach" to negotiations.[132] Lawyers representing the government in a legal challenge over the Article 50 process said that May would not trigger Article 50 before 2017.[133] However, in September 2016, The Washington Post highlighted the lack of coherent strategy following what it described as the "hurricane-strength political wreckage" left by the Brexit vote. It said the public still had no idea what the oft repeated "Brexit means Brexit" meant and there have been nearly as many statements on what the objectives were as there are cabinet ministers.[134]

The Supreme Court ruled in the Miller case in January 2017 that the government needed parliamentary approval to trigger Article 50.[135][136] After the House of Commons overwhelmingly voted, on 1 February 2017, for the government's bill authorising the prime minister to invoke Article 50,[137] the bill passed into law as the European Union (Notification of Withdrawal) Act 2017. Theresa May signed the letter invoking Article 50 on 28 March 2017, which was delivered on 29 March by Tim Barrow, the British ambassador to the EU, to Donald Tusk.[138][139][140]

On 20 July 2016, following her first overseas trip as prime minister, during which she flew to Berlin for talks with German Chancellor Angela Merkel, Theresa May reaffirmed her intention not to trigger Article 50 before 2017, suggesting it would take time for the UK to negotiate a "sensible and orderly departure" from the EU. However, although Merkel said it was right for the UK to "take a moment" before beginning the process, she urged May to provide more clarity on a timetable for negotiations. Shortly before travelling to Berlin, May had also announced that in the wake of the referendum, Britain would relinquish the presidency of the Council of the European Union, which passes between member states every six months on a rotation basis, and that the UK had been scheduled to hold in the second half of 2017.[141][142]

Of the constituent countries in the United Kingdom, England voted most in favour of leaving the European Union with 53% of voters choosing to leave compared to 47% of voters who chose to remain. Every region apart from Greater London returned large majority votes in favour of "Leave". The largest regional vote in favour of "Leave" was recorded in the West Midlands which saw 59% of voters chose to leave the EU which was closely followed by the East Midlands which saw 58% of voters opting to leave. The East Midlands also saw the two highest local authority votes in the United Kingdom in favour of leaving the EU which was recorded in the Borough of Boston in Lincolnshire in which 75.6% of voters chose to leave which was closely followed by the neighbouring local authority South Holland which saw 73% of voters there opting to leave.[147]

All 32 Scottish council areas returned majority votes in favour of "Remain" in Scotland

  Leave

  Remain

Scotland voted 62% to remain in the European Union, with all 32 council areas returning a majority for remaining (albeit with an extremely narrow margin of 122 votes in Moray).[148] Scottish First Minister Nicola Sturgeon said it was "clear that the people of Scotland see their future as part of the European Union" and that Scotland had "spoken decisively" with a "strong, unequivocal" vote to remain in the European Union.[149] The Scottish Government announced on 24 June 2016 that officials would plan for a "highly likely" second referendum on independence from the United Kingdom and start preparing legislation to that effect.[150] Former First Minister Alex Salmond said the vote was a "significant and material change" in Scotland's position within the United Kingdom, and that he was certain his party would implement its manifesto on holding a second referendum.[151] Sturgeon said she will communicate to all EU member states that "Scotland has voted to stay in the EU and I intend to discuss all options for doing so."[152] An emergency cabinet meeting on 25 June 2016 agreed that the Scottish Government would "begin immediate discussions with the EU institutions and other member states to explore all the possible options to protect Scotland's place in the EU."[153]

On 26 June, First Minister Nicola Sturgeon told the BBC that Scotland could attempt to refuse legislative consent for the UK's exit from the European Union,[154] and on 28 June, established a "standing council" of experts to advise her on how to protect Scotland's relationship with the EU.[155] On the same day she made the following statement: "I want to be clear to parliament that whilst I believe that independence is the best option for Scotland – I don’t think that will come as a surprise to anyone – it is not my starting point in these discussions. My starting point is to protect our relationship with the EU."[156] Sturgeon met with EU leaders in Brussels the next day to discuss Scotland remaining in the EU. Afterwards, she said the reception had been "sympathetic", in spite of France and Spain objecting to negotiations with Scotland, but conceded that she did not underestimate the challenges.[157]

Also on 28 June, Scottish MEP Alyn Smith received standing ovations from the European Parliament for a speech ending "Scotland did not let you down, do not let Scotland down."[158] Manfred Weber, the leader of the European People's Party Group and a key ally of Angela Merkel, said Scotland would be welcome to remain a member of the EU.[159] In an earlier Welt am Sonntag interview, Gunther Krichbaum, chairman of the Bundestag's European affairs committee, stated that "the EU will still consist of 28 member states, as I expect a new independence referendum in Scotland, which will then be successful," and urged to "respond quickly to an application for admission from the EU-friendly country."[160]

In a note to the US bank's clients, JP Morgan Senior Western Europe economist Malcolm Barr wrote: "Our base case is that Scotland will vote for independence and institute a new currency" by 2019.[161]

On 15 July, following her first official talks with Nicola Sturgeon at Bute House, Theresa May said that she was "willing to listen to options" on Scotland's future relationship with the European Union and wanted the Scottish government to be "fully involved" with discussions, but that Scotland had sent a "very clear message" on independence in 2014. Sturgeon said she was "very pleased" that May would listen to the Scottish Government, but that it would be "completely wrong" to block a referendum if it was wanted by the people of Scotland.[162][163] Two days later, Sturgeon told the BBC that she would consider holding a referendum for 2017 if the UK began the process of exiting the European Union without Scotland's future being secured.[164] She also suggested it may be possible for Scotland to remain part of the UK while also remaining part of the EU.[165] However, on 20 July, this idea was dismissed by Attorney General Jeremy Wright, who told the House of Commons that no part of the UK had a veto over the Article 50 process.[166]

On 28 March 2017, the Scottish parliament voted 69–59 in favour of holding a new referendum on Scottish Independence,[167] and on 31 March, Nicola Sturgeon wrote to PM May requesting permission to hold a second referendum.

Results in Northern Ireland

  Leave

  Remain

Religious belief in Northern Ireland

  More Catholic than Protestant

  More Protestant than Catholic

A referendum on Irish unification has been advocated by Sinn Féin, the largest nationalist/republican party in Ireland, which is represented both in the Northern Ireland Assembly and Dáil Éireann in the Republic of Ireland.[168] Northern Ireland's deputy First Minister, Martin McGuinness of Sinn Féin, called for a referendum on the subject following the UK's vote to leave the EU because the majority of the Northern Irish population voted to remain.[169] The First Minister, Arlene Foster of the Democratic Unionist Party, said that Northern Ireland's status remained secure and that the vote had strengthened the union within the United Kingdom.[170] This was echoed by DUP MLA Ian Paisley Jr., who nevertheless recommended that constituents apply for an Irish passport to retain EU rights.[171]

Wales along with England voted to leave.

  Leave

  Remain

Although Wales voted to leave the European Union, Leanne Wood, the leader of Plaid Cymru suggested that the result had "changed everything" and that it was time to begin a debate about independence for Wales. Sources including The Guardian have noted that opinion polls tend to put the number in favour of Wales seceding from the United Kingdom at 10%, but Wood suggested in a speech shortly after the referendum that attitudes could change following the result: "The Welsh economy and our constitution face unprecedented challenges. We must explore options that haven’t been properly debated until now."[172] On 5 July, a YouGov opinion poll commissioned by ITV Wales indicated that 35% would vote in favour of Welsh independence in the event that it meant Wales could stay in the European Union, but Professor Roger Scully, of Cardiff University's Wales Governance Centre said the poll indicated a "clear majority" against Wales ceasing to be part of the UK: “The overall message appears to be that while Brexit might reopen the discussion on Welsh independence there is little sign that the Leave vote in the EU referendum has yet inclined growing numbers of people to vote Leave in a referendum on Welsh independence from the UK."[173]

Voting on the referendum in Greater London

  Leave

  Remain

Greater London voted to remain in the EU, and Scottish First Minister Nicola Sturgeon said she had spoken to London Mayor Sadiq Khan about the possibility of remaining in the EU and said he shared that objective for London. A petition calling on Khan to declare London independent from the UK received tens of thousands of signatures.[174][175] The BBC reported the petition as tongue-in-cheek.[176] Supporters of London's independence argued that London's demographic, culture and values are different from the rest of England, and that it should become a city state similar to Singapore, while remaining an EU member state.[177][178] Spencer Livermore, Baron Livermore, said that London's independence "should be a goal," arguing that a London city-state would have twice the GDP of Singapore.[179] Khan said that complete independence was unrealistic, but demanded devolving more powers and autonomy for London.[180]

Spain's foreign minister José Manuel García-Margallo said "It's a complete change of outlook that opens up new possibilities on Gibraltar not seen for a very long time. I hope the formula of co-sovereignty – to be clear, the Spanish flag on the Rock – is much closer than before."[181] Gibraltar's Chief Minister Fabian Picardo however immediately dismissed García-Margallo's remarks, stating that "there will be no talks, or even talks about talks, about the sovereignty of Gibraltar", and asked Gibraltar's citizens "to ignore these noises".[182] This is while he was in talks with Nicola Sturgeon, the First Minister of Scotland, to keep Gibraltar in the EU, while remaining British too. He said that "I can imagine a situation where some parts of what is today the member state United Kingdom are stripped out and others remain." Nicola Sturgeon said on the same day that talks were under way with Gibraltar to build a "common cause" on EU membership.[183][184]

Within hours of the result's announcement, a petition, calling for a second referendum to be held in the event that a result was secured with less than 60% of the vote and on a turnout of less than 75%, attracted tens of thousands of new signatures. The petition had been initiated by William Oliver Healey of the English Democrats on 24 May 2016, when the Remain faction had been leading in the polls, and had received 22 signatures prior to the referendum result being declared.[204][205][206] On 26 June, Healey said that the petition had actually been started to favour an exit from the EU and that he was a strong supporter of the Vote Leave and Grassroots Out campaigns. Healey also said that the petition had been "hijacked by the remain campaign".[207][208] English Democrats chairman Robin Tilbrook suggested those who had signed the petition were experiencing "sour grapes" about the result of the referendum.[209]

By late July it had attracted over 4 million signatures, about one quarter of the total number of remain votes in the referendum and over forty times the 100,000 needed for any petition to be considered for debate in Parliament. As many as a thousand signatures per minute were being added during the day after the referendum vote, causing the website to crash on several occasions.[210][211] Some of the signatories had abstained from voting or had voted leave but regretted their decision, in what the media dubbed "bregret",[212][213] or "regrexit" at the result.[214][215]

No previous government petition had attracted as many signatures, but it was reported that the House of Commons Petitions Committee were investigating allegations of fraud. Chair of that committee, Helen Jones, said that the allegations were being taken seriously, and any signatures found to be fraudulent would be removed from the petition: "People adding fraudulent signatures to this petition should know that they undermine the cause they pretend to support."[204] By the afternoon of 26 June the House of Commons' petitions committee said that it had removed "about 77,000 signatures which were added fraudulently" and that it would continue to monitor the petition for "suspicious activity"; almost 40,000 signatures seemed to have come from the Vatican City, which has a population of under 1,000.[216] Hackers from 4chan claimed that they had added the signatures with the use of automated bots,[217] and that it was done as a prank.[216]

On 8 July, the Foreign and Commonwealth Office sent an email to all signatories of the petition setting out the government's position. It rejected calls for a second referendum: "Prime Minister and Government have been clear that this was a once in a generation vote and, as the Prime Minister has said, the decision must be respected."[219] On 12 July the Committee scheduled a debate on the petition for 5 September because of the "huge number" of people who had signed it, but stressed that this did not mean it was backing calls for a second referendum.[220] The debate, held in Westminster Hall, the House of Commons' second chamber, does not have the power to change the law; a spokesman for the Committee said that the debate would not pave the way for Parliament to decide on holding a second referendum.[221][222] The petition closed on 26 November 2016, having received 4,150,259 signatures.[223]

BBC political correspondent Iain Watson has argued that since the petition requests a piece of retrospective legislation, it is unlikely to be enacted.[204]

David Cameron had previously ruled out holding a second referendum, calling it "a once-in-a-lifetime event".[224][225] However, Jolyon Maugham QC, a barrister specialising in tax law, argued that a second referendum on EU membership could be triggered by one of two scenarios: following a snap general election won by one or more parties standing on a remain platform, or as a result of parliament deciding that circumstances had changed significantly enough to require a fresh mandate. Maugham cited several instances in which a country's electorate have been asked to reconsider the outcome of a referendum relating to the EU, among them the two Treaty of Lisbon referendums held in Ireland, in 2008 and 2009.[226]

Protesters calling for a second referendum near Palace of Westminster, January 2019

Historian Vernon Bogdanor said that a second referendum would be "highly unlikely", and suggested governments would be cautious about holding referendums in future,[227] but argued it could happen if the EU rethought some of its policies, such as those regarding the free movement of workers.[228] Political scientist John Curtice agreed that a change of circumstances could result in another referendum, but said the petition would have little effect.[227] In 2016, BBC legal correspondent Clive Coleman argued that a second referendum was "constitutionally possible [but] politically unthinkable. It would take something akin to a revolution and full-blown constitutional crisis for it to happen".[206] Conservative MP Dominic Grieve, a former Attorney General for England and Wales said that although the government should respect the result of the referendum, "it is of course possible that it will become apparent with the passage of time that public opinion has shifted on the matter. If so a second referendum may be justified."[229] Barristers Belinda McRae and Andrew Lodder argued the referendum "is wrongly being treated as a majority vote for the terms of exit that Britain can negotiate [with] the EU" when the public were not asked about the terms of exiting the EU, so a second referendum would be needed on that issue.[230] Richard Dawkins argued that if a second referendum upheld the result of the first, it would "unite the country behind Brexit".[231] However, political scientist Liubomir K. Topaloff argued that a second referendum would "surely destroy the EU" because the resulting anger of Leave supporters in the UK would spread anti-EU sentiment in other countries.[232]

On 26 June, former prime minister Tony Blair said the option of holding a second referendum should not be ruled out.[233] A week later he suggested the will of the people could change, and that Parliament should reflect that.[234] Alastair Campbell, the Downing Street Director of Communications under Blair called for a second referendum setting out "the terms on which we leave. And the terms on which we could remain".[235] Labour MP David Lammy commented that, as the referendum was advisory, Parliament should vote on whether to leave the EU.[236] On 1 July, Shadow chancellor John McDonnell outlined Labour's vision for leaving the EU, saying that Britain had to respect the decision that was made in the referendum.[237]

Following the first post-referendum meeting of the Cabinet on 27 June, a spokesman for the Prime Minister said that the possibility of a second referendum was "not remotely on the cards. There was a decisive result [in the EU referendum]. The focus of the Cabinet discussion was how we get on and deliver that."[124] Theresa May also ruled out the possibility at the launch of her campaign to succeed Cameron.[238] On 28 June, Health Secretary Jeremy Hunt raised the possibility of a second referendum, but said that it would be about the terms of the UK's exit from the European Union rather than on the issue of EU membership.[239] Labour MP Geraint Davies also suggested that a second referendum would focus on the terms of an exit plan, with a default of remaining in the EU if it were rejected. Citing a poll published in the week after the referendum that indicated as many as 1.1 million people who voted to leave the EU regretted their decision, he tabled an early day motion calling for an exit package referendum.[240]

On 26 June it was reported that Conservative grandee Michael Heseltine was suggesting that a second referendum should take place after Brexit negotiations, pointing to the overwhelming majority in the House of Commons against leaving the EU.[241] On 13 July, Labour leadership candidate Owen Smith said that he would offer a second referendum on the terms of EU withdrawal if elected to lead the party.[242]

The outcome of the referendum was debated by the Church of England's General Synod on 8 July, where Archbishop of Canterbury Justin Welby ruled out supporting a second referendum.[243] The idea of a second referendum was also rejected by Plaid Cymru leader Leanne Wood, who favoured a general election following negotiations instead.[244] Sammy Wilson, a Democratic Unionist Party MP likened those calling for a second referendum to fascists, saying "They don't wish to have the democratic wishes of the people honoured... They wish to have only their views."[245]

Polls in 2016 and 2017 did not find public support for a second referendum,[246][247] with YouGov polling indicating a slim majority for the first time on 27 July 2018.[248]

The TUC has said that they fear any Brexit deal might harm workers' interests and lead to workers in many industries losing their jobs. Frances O'Grady of the TUC said that unless the government provides a deal that is good for working people, the TUC will strongly "throw our full weight behind a campaign for a popular vote so that people get a say on whether that deal is good enough or not."[249]

A pro-EU demonstration in London, March 2017

Pro-EU demonstrations took place in the days following the referendum result. On 24 June, protesters gathered in cities across the UK, including London, Edinburgh and Glasgow. At one demonstration in London hundreds of protesters marched on the headquarters of News UK to protest against "anti-immigration politics".[250] Protesters on bicycles angry at the result attempted to block Boris Johnson's car as he was leaving his home on the morning of 24 June, while campaigners aged 18–25, as well as some teenagers under the age of majority, staged a protest outside Parliament.[251]

On 28 June, up to 50,000 people attended Stand Together, a pro-EU demonstration organised for London's Trafalgar Square, despite the event having been officially cancelled amid safety concerns. The organiser had announced the rally on social media, with a view to bringing "20 friends together", but urged people not to attend as the number of people expressing interest reached 50,000. The meeting was addressed by Liberal Democrat leader Tim Farron before protesters made their way to Whitehall. A similar event in Cardiff was addressed by speakers including Plaid Cymru leader Leanne Wood.[252] On 2 July, around 50,000 demonstrators marched in London to show support for the EU and to demand that Britain continues to co-operate with other European states.[253][254] A similar event was held in Edinburgh outside the Scottish Parliament building.[255]

On 8 July 2016, and in response to the referendum result, The New European, was launched with an initial print run of 200,000. This is a national weekly newspaper aimed at people who voted to remain in the EU, which its editor felt had not been represented by the traditional media, and remains in print as of December 2017.[256][257][258]

Some Brexit supporters such as David Davies, Steve Double, William Wragg and Sir David Amess called for the Brexit referendum result on 23 June 2016 to be recognised as British Independence Day and be made a public holiday in the United Kingdom.[259][260][261] The concept was widely used in social media, with the BBC naming it as one of "Five social media trends after Brexit vote".[262][263] With support from Conservative MP Nigel Evans,[264][265] an online petition on the British Parliament government website calling for the date to be "designated as Independence Day, and celebrated annually" reached sufficient signatures to trigger a government response, which stated there were "no current plans to create another public holiday".[266][267][268]

On 5 September 2017, a number of Conservative MPs backed MP Peter Bone's June Bank Holiday (Creation) Bill in the House of Commons, for the Brexit referendum date to be a UK-wide public holiday.[269][259][270] The bill proposes that "June 23 or the subsequent weekday when June 23 falls at a weekend" should serve as a national holiday.[271][272][273]

Pro-EU protester in Birmingham blames Russia for Brexit, September 2018

In the run up to the Brexit referendum, Prime Minister David Cameron had suggested that Russia "might be happy" with a positive Brexit vote, while the Remain campaign accused the Kremlin of secretly backing a positive Brexit vote.[279] In December 2016, Ben Bradshaw MP claimed in Parliament that it was "highly probable" that Russia had interfered in the Brexit referendum campaign,[280] later calling on the British intelligence service, Government Communications Headquarters (then under Boris Johnson as Foreign Secretary) to reveal the information it had on Russian interference.[281] In April 2017, the House of Commons Public Administration and Constitutional Affairs Committee issued a report stating that Russian and foreign interference in the referendum was probable, including the shut down of the government voter registration website immediately before the vote.[282]

In May 2017, it was reported by the Irish Times that £425,622 had potentially been donated by sources in Saudi Arabia to the "vote leave" supporting Democratic Unionist Party for spending during the referendum.[283]

Some British politicians accused U.S. President Barack Obama of interfering in the Brexit vote by publicly stating his support for continued EU membership.[284]