Status of Gibraltar

In his evidence to the UK Parliament Foreign Affairs Committee in 2008, Jim Murphy MP, Minister of State for Europe stated:[13]

The UK Government will never enter into an agreement on sovereignty without the agreement of the Government of Gibraltar and their people. In fact, we will never even enter into a process without that agreement. The word 'never' sends a substantial and clear commitment and has been used for a purpose. We have delivered that message with confidence to the peoples and the Governments of Gibraltar and Spain. It is a sign of the maturity of our relationship now that that is accepted as the UK's position.

The British Government has ruled out the independence of Gibraltar because, according to the British view, under the Treaty of Utrecht it would require Spanish consent,[14] and has ruled out Gibraltar's integration into the United Kingdom.

I will note that, in the view of Her Majesty's Government, Gibraltar's right of self determination is not constrained by the Treaty of Utrecht except in so far as Article X gives Spain the right of refusal should Britain ever renounce Sovereignty. Thus independence would only be an option with Spanish consent.

The option of integration was rejected on 26 June 1976, when the British Government issued the Hattersley Memorandum ruling out integration in order to "avoid innovations which might result in prolongation of the frontier restrictions imposed by Spain."[15]

Gibraltar argues that the Spanish claims are baseless, pointing to the right to self-determination of all peoples, guaranteed and enshrined by the UN, according to the UN Charter. Its article 1 states that "The Purposes of the United Nations are ... to develop friendly relations among nations based on respect for the principle of equal rights and self-determination of peoples."

To the same section 2 of Resolution 1514 (XV) states: "All peoples have the right to self-determination; by virtue of that right they freely determine their political status and freely pursue their economic, social and cultural development."

Furthermore, resolution 2231 (XXI) itself recalls and demands implementation of Resolution 1514(XV) (guaranteeing Gibraltar's right to self-determination) and therefore it believes that the Spanish claim for its territorial integrity (which would not be affected by Gibraltar's decolonisation) cannot displace or extinguish the rights of the people of Gibraltar under resolution 1514(XV) or under the Charter. From this point of view, any additional right that Spain could claim by virtue of the "reversionary" clause contained in the Treaty of Utrecht is overruled and annulled under article 103 of the UN Charter: " In the event of a conflict between the obligations of the Members of the United Nations under the present Charter and their obligations under any other international agreement, their obligations under the present Charter shall prevail."

Gibraltar National Day, 2013

Finally, it is argued that there is in fact no principle in International Law or UN doctrine that can displace the inalienable right to self-determination. In this regard, in 2008, the UN 4th Committee rejected the claim that a dispute over sovereignty affected self-determination, affirming it to be a basic human right.[16]

The Gibraltar Government has also argued that Gibraltar is a British territory and therefore by definition not an integral part of any other state, implying that Spain's territorial integrity cannot be affected by anything that occurs in Gibraltar: "Even if integration of a territory was demanded by an interested State it could not be had without ascertaining the freely expressed will of the people, the very sine qua non of all decolonisation."

In a referendum held in Gibraltar in September 2002, Gibraltarian voters rejected even partial Spanish sovereignty.[17]

Speaking to the UK Parliament Foreign Affairs committee in March 2008 Peter Caruana the Chief Minister of Gibraltar noted:

Spain does not dispute that Gibraltar is properly, in law, British territory. Therefore, this is not disputed land. She has a political claim to the return of Gibraltar sovereignty, but she does not dispute the fact that in proper international law, she ceded sovereignty to Britain in perpetuity and therefore it is undisputed British sovereign territory.[18]

Gibraltarians seem to remain mistrustful of Spain despite improved relations.[19][20][21]

The traditional Spanish position is based on territorial integrity, as per UN Resolution 1514 (XV) (1960), which according to Spain, complements and constrains the right to self-determination:

"Any attempt aimed at the partial or total disruption of the national unity and the territorial integrity of a country is incompatible with the purposes and principles of the Charter of the United Nations."

During the 1960s, the UN General Assembly passed five resolutions on the issue (2231 (XXI), "Question of Gibraltar"[22] and 2353 (XXII), "Question of Gibraltar"[23]). The resolutions on the decolonisation of Gibraltar focused on the "interests" and not the "wishes" of the Gibraltarians. The latter resolution states that:

any colonial situation which partially or completely destroys the national unity and territorial integrity of a country is incompatible with the purposes and principles of the Charter of the United Nations and especially with paragraph 6 of Resolution 1514 (XV) of the General Assembly [...] Invites the Governments of Spain and the United Kingdom of Great Britain and Northern Ireland to resume without delay the negotiations provided for in General Assembly Resolutions 2070 (XX) and 2231 (XXI), with a view to putting an end to the colonial situation in Gibraltar and to safeguarding the interests of the population.

From such a point of view, Gibraltarians are seen as mere "settlers" from the United Kingdom and other countries and only their interests, not their wishes (as the right to self-determination would involve), need be safeguarded. The point of view that they were settlers is supported by the fact that following the 1704 capture of Gibraltar by Anglo-Dutch troops, only around 70 out of the original 5,000 Spanish inhabitants chose to remain in Gibraltar.[24] Therefore, Spain has insisted that the Gibraltar dispute is a purely bilateral matter with the United Kingdom and has ignored the role and will of the Gibraltarians.

The first formal proposal on how to achieve the return of Gibraltar to Spain was made on 18 May 1966 by the Spanish Minister of Foreign Affairs, Fernando Castiella. The proposal comprised three clauses:[25][26]

1. "The cancellation of the Treaty of Utrecht and the subsequent return of Gibraltar to Spain."
2. "The stay of the British base in Gibraltar, its use being subject to a specific Anglo-Spanish agreement."
3. "A 'Personal Statute' for Gibraltarians, under United Nations guarantee, protecting their cultural, social and economic interest in Gibraltar or anywhere else in Spain, including their British nationality. An 'appropriate ... administrative formula' should be also agreed."

The proposal was rejected by the British Government and by the Gibraltarians, which overwhelmingly voted to remain under British sovereignty in a referendum held in 1967 (12,138 to 44).

As a result, the UN General Assembly, during its twenty-third session, adopted resolution 2429 of 1968 (XXIII), denounced the 1967 referendum and requested the United Kingdom not to delay negotiations.[27]

No further advance for the Spanish claims was achieved for the following forty years. In view of that, the Spanish position seems to have softened, being redirected towards some form of temporary or permanent arrangement to achieve joint sovereignty, which has been proposed by Spain and discussed with the British Government. Such a proposal was tabled by the Spanish Minister for Foreign Affairs, Fernando Morán, in 1985. The details of the proposal were not made public, but information released showed an offer on a treaty with the United Kingdom in order to "re-integrate" Gibraltar with Spain, while preserving Gibraltarians' way of life. They would keep their British nationality, as well as their existing political and labour rights, self-government and institutions. Morán proposed that a condominium or leaseback arrangement should be agreed, over a 15 or 20-year period.[28] This proposal was not formally rejected by Douglas Hurd, the British Foreign Secretary, until 1993.

In 1997 a second proposal was made by the Spanish Minister for Foreign Affairs, Abel Matutes, foreseeing a hundred-year period of joint sovereignty before a definite transfer to Spain.[29] A similar scheme was provisionally agreed between the Spanish and British governments in the spring of 2002, but this was eventually abandoned, after sustained opposition by the Gibraltarians that included the Gibraltar sovereignty referendum of 2002.

Spain reported to the UN in 2016 that:

• the UK was refusing to negotiate on sovereignty[5]^:12/16
• the land occupied by the UK was greater than that ceded by the Treaty of Utrecht[5]^:13/16
• it was the restoration of Spanish territorial integrity that was the key, not self-determination[5]^:13/16
• the 2006 constitution had not changed the international status of Gibraltar, with the local authorities having no right to interfere in the negotiations about the (according to Spain) illegal occupation of Spanish territory[5]^:13/16
• Spain would not agree to any situation that was detrimental to people in the area or to the finances of Spain or the EU[5]^:13/16
• the border checks were EU regulated and designed to stop illegal trafficking of tobacco that was costing the region tax revenue, and that Gibraltar was operating as a tax haven[5]^:13/16
• Spain was happy to discuss sovereignty issues with the UK and to have four-way ad hoc discussion on local issues[5]^:13/16[30]

The territory of Gibraltar contains an 800-metre (2,625 ft) section of the isthmus that links the Rock[37] with Spain. It is argued by Spain that this section of the isthmus was never ceded by Spain; rather, it was gradually occupied de facto by the British.[38]

The growth of Gibraltar onto the southern half of the isthmus began with the construction of two forts in the northernmost part of the ceded territory. In 1815, Gibraltar suffered a yellow fever epidemic. This led to a Spanish concession so a temporary quarantine health camp could be built on the isthmus. After the plague was over, the British did not remove the camp. In 1854, a new epidemic prompted more health camps, which eventually gained Gibraltar these extra 800 metres of land. The occupation of the isthmus culminated in 1938-1939 with the construction of the aerodrome during the Spanish civil war.[39]

The Treaty of Utrecht did not mention British sovereignty over Gibraltar beyond the fortified perimeter of the town as it was in 1713. However the Treaty ceded the town "together with the port, fortifications, and forts thereunto belonging", which included several forts along the line of the current frontier. The United Kingdom further claims title to the southern half of the isthmus based on continuous possession over a long period.

The territory north of the current border had been occupied by Spain in the 1730s, during the construction of the so-called Spanish Lines or more properly Lines of Contravallation of Gibraltar.

Both the United Kingdom and Spain have ratified the United Nations Convention on the Law of the Sea of 1982, which governs countries' oceanic territorial claims. Both countries made statements regarding Gibraltar in their declarations upon ratification of the Convention. The Spanish statement was:

2. In ratifying the Convention, Spain wishes to make it known that this act cannot be construed as recognition of any rights or status regarding the maritime space of Gibraltar that are not included in article 10 of the Treaty of Utrecht of 13 July 1713 concluded between the Crowns of Spain and Great Britain. Furthermore, Spain does not consider that Resolution III of the Third United Nations Conference on the Law of the Sea is applicable to the colony of Gibraltar, which is subject to a process of decolonization in which only relevant resolutions adopted by the United Nations General Assembly are applicable.[40]

The British government responded to the Spanish statement in their own statement:

With regard to point 2 of the declaration made upon ratification of the Convention by the Government of Spain, the Government of the United Kingdom has no doubt about the sovereignty of the United Kingdom over Gibraltar, including its territorial waters. The Government of the United Kingdom, as the administering authority of Gibraltar, has extended the United Kingdom's accession to the Convention and ratification of the Agreement to Gibraltar. The Government of the United Kingdom, therefore, rejects as unfounded point 2 of the Spanish declaration.[41]

However, Articles 309 and 310 of the Convention state that "No reservations or exceptions may be made to this Convention unless expressly permitted by other articles of this Convention", and that if a signatory state makes a declaration upon ratification, that declaration must "not purport to exclude or to modify the legal effect of the provisions of this Convention in their application" to that state.[42]

The dispute over territorial waters, which was rekindled in 2013 following a fishing dispute[43] seems likely to become more important with the discovery of a British treasure ship, HMS Sussex, and the Black Swan Project controversy.

Questions about the waters have previously been asked in the House of Commons, and answered as follows:

Under international law, States are entitled, but not required, to extend their territorial sea up to a maximum breadth of 12 nautical miles. Where the coasts of two States are opposite or adjacent, the general rule is that neither is entitled, unless they agree otherwise, to extend its territorial sea beyond the median line. The UK Government considers that a limit of three nautical miles is sufficient in the case of Gibraltar.

The Government of Gibraltar for its part holds that there is no economic or social need for more than three nautical miles of territorial water, limited to two nautical miles to the west in the Bay of Gibraltar due to the median line between British and Spain land.[44]

At the end of 2008, the European Commission included most of the territorial waters that surround Gibraltar under a marine conservation area known as the "Estrecho Oriental" that will be maintained by Spain. The UK initiated legal proceedings with the support of Gibraltar, which were initially rejected by the General Court on procedural grounds. A 2011 appeal was dismissed, again on procedural grounds.[45] The European Court of Justice had again ruled against that appeal in 2012.[46]

There have been disputes concerning Spanish patrol boats inside these claimed territorial waters. In May 2009 there was a number of Spanish incursions into British-claimed waters around Gibraltar, including by a Spanish Navy fisheries protection vessel, leading to intervention by police and a diplomatic protest by the UK.[47][48]

Under the United Nations Convention on the Law of the Sea, vessels passing through the Strait of Gibraltar do so under the regime of transit passage, rather than the more limited innocent passage allowed in most territorial waters.[44][49]

The Spanish government argues[50] that Gibraltar's tax schemes harm the Spanish economy. In January 2005, the European Commissioner for Competition requested the UK (responsible for Gibraltar's external relations) to abolish Gibraltar's tax-exempt company regime by the end of 2010 (at the latest) on the basis that it constitutes illegal state aid that could distort competition.[51] Unlike other tax havens like Andorra, Gibraltar has not signed a mutual agreement with Spain to exchange fiscal information, although such an agreement has been offered by the Gibraltar Government, but Spain has declined to accept it because it does not consider Gibraltar as its diplomatic counterpart.[52] Another concern that has been raised is that each day thousands of Spaniards buy goods at cheaper prices in Gibraltar due to exchange rates and lack of VAT, contributing to the Gibraltar economy instead of that of Spain.

The Spanish government wants to increase the exchange of fiscal information[50] in order to prevent Gibraltar banks being used for tax evasion and money laundering. The United Kingdom House of Commons Foreign Affairs Select Committee has directed an inquiry that determined that Gibraltar has always complied with all international and EU requirements to prevent such activity.

We conclude that the series of allegations which Spain makes against Gibraltar appear almost wholly to be without substance. In many cases, it is not just the Government of Gibraltar but the British Government as well which is traduced. It is deeply regrettable that allegations are made that cannot be sustained by a basis in fact. If concrete evidence of wrong-doing were produced, the British Government should act promptly to deal with the problem. But so long as allegations are unsubstantiated, the British Government should continue to rebut them promptly and decisively.[53]

Referred to as an "international financial centre",[54] Gibraltar was among 35 jurisdictions identified by the Organisation for Economic Co-operation and Development (OECD) as a tax haven in June 2000.[55] As a result of having made a commitment in accordance with the OECD's 2001 Progress Report on the OECD's Project on Harmful Tax Practices, Gibraltar was not included in the OECD's list of uncooperative tax havens.[55] However, in its April 2009 progress report, the OECD listed Gibraltar in the list of jurisdictions that, although committed, had not "substantially implemented" yet the internationally agreed tax standard.[56] Following Gibraltar's signing of 12 additional Tax Information Exchange Agreements (TIEAs), as of October 2009, with jurisdictions including the UK, USA and Germany,[57] Gibraltar was listed in the OECD "white list". It is currently listed as "largely compliant" by the OECD's Global Forum on Transparency and Exchange of Information for Tax Purposes.[58]

Along with the Isle of Man and Cyprus, Gibraltar has been used as an international finance centre by the Russian conglomerate Yukos/Menatep.[59]

There have been claims that some Gibraltarian motorboats are engaging in drugs and tobacco smuggling.[60] However, since 1996 there has been a law in Gibraltar controlling fast launches licensing their ownership and importation and prohibiting the entry of unlicensed craft into Gibraltar waters. In 2014, inspectors from the EU's fraud office OLAF wrote to the Spanish governments urging an investigation of tobacco smuggling, amid revelations that Gibraltar, with a population of less than 30,000, imported 117 million packets of cigarettes in 2013. In 2015, Spanish authorities broke up a major tobacco smuggling operation, seizing 65,000 packs of cigarettes, five boats, two firearms, communications equipment and €100,000 cash.[61] Authorities estimated the group was smuggling 150,000 packs of contraband tobacco into Spain every week.[61]

Military control of the Strait of Gibraltar has historically been the most important use of Gibraltar, allowing Britain to defend its trade lanes to the East. The British admiral Lord Fisher stated that Gibraltar was one of the five keys that locked the world, together with Dover, Alexandria, Cape of Good Hope and Singapore, all of which have been controlled by Britain at one point.[62]

Its military relevance has reduced with the construction in 1953 of the US Naval Station Rota (the biggest Allied base in the area) and with the end of the Cold War, but it is still an important position as more than one quarter of the global maritime traffic transits through the strait every year. Controlling the strait is of vital importance to NATO. The task of controlling the strait has been traditionally assigned by NATO to the UK, but the recent advances that Spain has made in its armed forces and the bases Spain has in the zone have made NATO reconsider this.[63] However, the tense relations that Spain had with the American administration under George W. Bush and the special friendship of the US with the UK have caused NATO to take a more favourable position towards the UK and Morocco for control of the strait.[64]

In May 1954, despite objections by Spain, Queen Elizabeth II visited Gibraltar. Spanish dictator Francisco Franco had renewed claims to The Rock. British National Archives files from 1953 show that Franco claimed that Spain had been promised The Rock in return for not attacking the territory during the Second World War. The Foreign and Commonwealth Office conducted a full review of their files to see whether Franco's claim had any foundation. A confidential memo called the Spanish communiqué "a flimsy and unconvincing document", and the Government put an end to the dispute by refusing to comment on the claims.[65]

In a 1967 referendum on sovereignty organised by the British Government, 99.6% of voters voted to remain under British sovereignty.

In a second referendum on sovereignty held in November 2002 by the Government of Gibraltar, 187 voted yes (1%) and 17,900 voted no (99%) on the proposal of sharing sovereignty with Spain.[66] The question put was:

25,000 Gibraltarians demonstrate against joint sovereignty proposals on 18 March 2002

On the 12 July 2002 the Foreign Secretary, Jack Straw, in a formal statement in the House of Commons, said that after twelve months of negotiation the British Government and Spain are in broad agreement on many of the principles that should underpin a lasting settlement of Spain's sovereignty claim, which included the principle that Britain and Spain should share sovereignty over Gibraltar.

Do you approve of the principle that Britain and Spain should share sovereignty over Gibraltar?

Spanish reaction varied from questioning the validity of the process, to observing that no Spanish government has done enough to make joint sovereignty or integration with Spain an attractive prospect.[67]

It is reported that Spanish "secret funds" were used to create a favourable opinion in Gibraltar to the Spanish sovereignty claim.[68] How the money was spent remains uncertain.

The closed Spanish gate at the border between Gibraltar and Spain, 1977

After the Spanish constitution, Spain was still reluctant to re-open the border because of the consequences it might have. However the border was re-opened in 1984, allowing free access between both sides, although Spain did not open ferry services until later. Further problems have been encountered regarding the airport, as it is placed on disputed neutral land. Under the Lisbon Agreement of 1980:

Both Governments have reached agreement on the re-establishment of direct communications in the region. The Spanish Government has decided to suspend the application of the measures at present in force.

This was to include reinstatement of a ferry service between Gibraltar and Algeciras. This was finally reinstated after 40 years, on 16 December 2009, operated by the Spanish company Transcoma.[69]

At the end of 2006, the restrictions on the airport were removed as a result of the Córdoba Agreement (2006) and direct flights from Madrid by Iberia started operation.[70]

On 22 September 2008, however, Iberia announced that it would cease its flights to Madrid by 28 September due to "economic reasons", namely, lack of demand. This left Gibraltar without any air links with Spain,[71] until May 2009 when Air Andalus opened a service.[72] Air communications with Spain ceased again in August 2010, when Air Andalus lost its licence.

Spain demonstrated opposition to Gibraltar's membership of UEFA.[73]

2000 – An issue of contention was the repair of the nuclear powered submarine, HMS Tireless. The Government of Spain expressed its concern about the effective safety for the inhabitants of Gibraltar and the some 250,000 people living in the Campo de Gibraltar, the adjacent area in Spain.

The inhabitants of the area saw this repair as a precedent of future repair operations in Gibraltar rather than the one-off emergency the British Government has claimed (no other nuclear submarine has been repaired in Gibraltar since). On the other hand, the Government of Gibraltar accused Spain of using this incident as an excuse to justify its 300-year-old sovereignty claim to Gibraltar. Despite many protests, the Government of Gibraltar allowed the work to be done after employing its own experts to confirm it could be undertaken safely. The submarine was in Gibraltar for a year before leaving, during which the repair was completed without incident.

Subsequently, Spanish politicians have complained about every nuclear submarine visit to Gibraltar, and have tried unsuccessfully to get a reassurance that this would totally stop. There have been no further protests against nuclear submarines in Gibraltar. Commenting, the Government of Gibraltar said: "Nuclear submarine visits to Gibraltar are a matter for the UK and Gibraltar. Visits for operational or recreational purposes are welcomed by the Gibraltar Government ... To our knowledge, it is not the position of the present Spanish Government or any previous Spanish Government, that it is opposed to visits by nuclear submarines."

2002 – In the months that predated the referendum called by the Gibraltar government on the joint sovereignty agreement disagreements could be categorised as:

• Control of the military installations. Spain wished to control the military installations of the territory, even in the event of joint sovereignty. This pretension was considered unacceptable by the British Ministry of Defence.
• The referendum itself. Both the Spanish and British governments stated that the referendum had no legal effect, but it clearly indicated the democratically expressed will of the people of Gibraltar to "not be Spanish". As the British Government is committed to respect those wishes, the idea of a joint sovereignty deal has been abandoned.

2004 – A visit by The Princess Royal in June 2004, the brief return of HMS Tireless in July 2004, together with the Tercentenary Celebrations of the capture of The Rock were subjects of complaint by the Spanish Government.

A new round of talks on a tri-lateral basis were proposed in October 2004 to discuss regional co-operation. In February 2005 the first talks took place at a meeting held in Málaga and subsequently in Portugal and London.

This is the first sign of formal recognition of the Government of Gibraltar, and has been generally welcomed. The main issues of the talks have been a new agreement on the airport, the pensions of the Spanish workers that worked in Gibraltar during the 1960s, and the removal of Spanish restrictions on telecommunications.

2006 – Those issues were successfully resolved in September 2006 in the Córdoba Agreement. The process continues.

2007 – A bulk carrier, the MV New Flame, ran aground south of Europa Point in Gibraltar and broke up on the reef in August 2007, generating accusations of pollution in Spain and claims not only against the Government of Gibraltar but also against that of Spain.[74] Its cargo was scrap metal and the vessel's fuel was promptly drained.[75][76][77] The Government of Gibraltar claimed in December 2007 that the operation did not represent a material risk to the environment since the vessel had been defuelled and only small, remnant amounts of fuel remained in the engines themselves.[78] The Spanish branch of Greenpeace claimed that, as late as February 2008, fuel spills from the New Flame had polluted Spanish beaches around the Bay of Gibraltar.[79] Official Spanish sources played this down stating that the fuel reaching the beaches of Algeciras was in "insignificant amounts".[80]

2009 – The dispute over British-claimed territorial waters gained prominence with deliberate incursions by Spain, triggering angry headlines in the UK tabloid press.[81] In December 2009, four armed Civil Guard officers were detained after three landed in Gibraltar in pursuit of two suspected smugglers, who were themselves arrested. The Spanish Interior Minister Alfredo Pérez Rubalcaba personally telephoned Chief Minister Peter Caruana to apologise, stating that there were "no political intentions" behind the incident. The Chief Minister was prepared to accept it had not been a political act. The Spanish officers were released by the police the following day, who said that "Enquiries established that the Guardia Civil mistakenly entered Gibraltar Territorial Waters in hot pursuit and have since apologised for their actions."[82][83]

2012 – Queen Sofía of Spain cancelled plans to travel to the United Kingdom to participate in the Diamond Jubilee of Elizabeth II. The cancellation was a protest in response to a planned visit to Gibraltar by Prince Edward. The Spanish government also lodged a protest to the planned visit by Prince Edward, Earl of Wessex. Relations between Britain and Spain reportedly "returned to a state of growing confrontation" following the election of Spanish Prime Minister Mariano Rajoy of the People's Party in December 2011.[84] Additional protests followed in August 2012 after Gibraltar abrogated an accord that allowed Spanish fishing boats to operate in its waters.[85][86]

2013 – Disagreements between Spain and the United Kingdom Government re-surfaced in July 2013, initially after the Gibraltar Government placed a number of concrete blocks in the sea off the coast of Gibraltar, intending to form an artificial reef. The Spanish Government protested however stating that it had a negative impact on fishing in the area, restricting access for Spanish fishing vessels. At the end of July the Spanish Government introduced extra border checks for people going in and out of the territory into Spain. The British Government protested as the checks were causing major delays of up to seven hours while people waited to cross the border, and on 2 August the Spanish Ambassador was summoned to the British Foreign and Commonwealth Office in London to discuss these developments.[87]

On 2 August 2013, Spanish Foreign Minister José Manuel Garcia-Margallo gave an interview to Spain's ABC newspaper. He announced possible plans to introduce a 50 euro border crossing fee for people going to and from Gibraltar, in response to the creation of the artificial reef. Plans to close Spanish airspace to Gibraltar bound flights were also reported, as were plans for an investigation by Spanish tax authorities into property owned by around 6,000 Gibraltarians in neighbouring parts of Spain. The Spanish Foreign Minister also mooted plans to changes in the law meaning British online gaming companies based in Gibraltar would have to base servers in Spain, meaning that they would come under Madrid's tax regime.

The British Foreign office responded to these comments: "The prime minister has made clear that the UK government will meet its constitutional commitments to the people of Gibraltar and will not compromise on sovereignty."[88]

After the United Kingdom voted to leave the European Union, despite a strong vote to remain in Gibraltar, on 23 June 2016, Spain reiterated its position that it wanted to jointly govern Gibraltar with the United Kingdom and said it would seek to block Gibraltar from participating in talks over future deals between the UK and EU.[89] The European council released a series of guidelines on negotiations for withdrawal, with core principal number 22 stating that any agreement affecting Gibraltar needed the agreement of Spain[90] suggesting that Spain had been given a veto while the United Kingdom re-iterated its commitment to Gibraltar.

On 18 October 2018, Spanish Prime Minister Pedro Sánchez announced that he had reached an agreement with Britain, declaring that a special protocol about Gibraltar was being prepared along with the UK Government and was hopeful to reach a good agreement for both parties.[91][92][93][94] However, on 19 November 2018, the Spanish Government threatened not to support the Brexit Agreement Draft because they say that an article was added without their consent that could be misunderstood and leave Spain without a say over Gibraltar.[95] On 22 November 2018, PM Sánchez and PM May discussed the problem but the Spanish PM declared that "our positions remain far away. My Government will always defend the interests of Spain. If there are no changes, we will veto Brexit."[96][97][98] On 24 November 2018, Spain agreed not to veto the Brexit deal in exchange for a tripartite statement of the European Commission President and the European Council President, the UK Government and the EU Member States saying that no deal would be reached about Gibraltar without Spain's consent. The European statement also declared that the EU does not consider Gibraltar to be part of the United Kingdom.[99][100][101]

British sources

• ^ George Hills (1974). Rock of Contention. A History of Gibraltar. London: Robert Hale. ISBN 0-7091-4352-4. George Hills was a BBC World Service broadcaster, Spanish Historian and Fellow of the Royal Historical Society. Although listed as a 'British' source, Hills supports the Spanish view of Gibraltar. He died in 2002. His research documents are now available at King's College, UCL as a separate collection.
• ^ Jackson, William (1990). The Rock of the Gibraltarians. A History of Gibraltar (2nd ed.). Grendon, Northamptonshire, UK: Gibraltar Books. General Sir William Jackson was Governor of Gibraltar between 1978 and 1982, a military Historian and former Chairman of the Friends of Gibraltar Heritage.

Spanish sources

• ^ Sepúlveda, Isidro (2004). Gibraltar. La razón y la fuerza (Gibraltar. The reason and the force). in Spanish. Madrid: Alianza Editorial. ISBN 84-206-4184-7. Chapter 2, "La lucha por Gibraltar" (The Struggle for Gibraltar) is available online (PDF). Isidro Sepúlveda Muñoz is a Contemporary History Professor in the UNED ("Universidad Nacional de Educación a Distancia").
• ^ Cajal, Máximo (2003). Siglo XXI Editores (ed.). Ceuta, Melilla, Olivenza y Gibraltar. Donde termina España (Ceuta, Melilla, Olivenza y Gibraltar. Where Spain ends). In Spanish. Madrid: Siglo Veintiuno de España Editores. ISBN 84-323-1138-3. Máximo Cajal is a Spanish diplomatist, ambassador in different countries and special representative of the former Spanish Prime Minister, José Luis Rodríguez Zapatero, in the Alliance of Civilizations. He was the only survivor of the assault of the Embassy of Spain in Guatemala by the forces of the Guatemalan dictatorship in 1980.

• Fawcett, J. E. S. Gibraltar: The Legal Issues in International Affairs (Royal Institute of International Affairs), Vol. 43, No. 2 (Apr., 1967)