Bombardier Voyager

• The Class 220s and 221s have been criticised for being cramped as they are designed to be able to be converted to tilting operation, since when tilted they must still fit within the loading gauge.
• Because there is one diesel engine per car, there is increased underfloor noise, vibration and rattles when compared to the InterCity 125 sets and locomotive hauled trains that the units in this family replaced.
• There is very little space to store heavy luggage or bicycles. Although CrossCountry has now removed the shops from its trains to increase capacity, the bicycle compartment can now only store 3 instead of the original 4 bicycles.
• CrossCountry services formed of Classes 220 and 221 frequently have to be stopped at Exeter St Davids or Newton Abbot when waves break over the Dawlish sea wall, due to the roof mounted brake resistors.
• The trains are notably shorter than the trains they replaced, resulting in reduced capacity. In addition, most seating in Standard Class is in airline configuration with fold-down tables, which are too small for large laptops.

• In 2006, a Class 222 unit had to be taken out of service due to a door opening in Northamptonshire on a London-Sheffield service, while the train was at speed.[12]
• On 26 May 2006, a passenger was murdered on board 220005 as the train pulled into Oxenholme whilst working the Glasgow to Paignton service.[13]
• On 14 March 2008, a fire broke out on a Voyager at Banbury. About 100 passengers were evacuated from the train.[14]
• On 20 April 2012, a Voyager unit caught fire at Nottingham. The fire was caused by a buildup of grime which was heated by the movement of the train's wheels.[15]
• On 18 July 2018, a Voyager unit caught fire shortly after leaving Derby whilst operating a service to Glasgow Central. All 175 passengers were evacuated.[16]
• On 26th of September 2019 an electrical explosion occurred in a vestibule on Voyager unit 221132 (coach 60982). Fortunately this was on an ECS Glossary of rail transport terms#E move and occurred between the Central Rivers depot and Birmingham New Street station and was discovered when the driver changed ends.[17][18]

In 2010 Bombardier proposed the conversion of several Voyager multiple units into hybrid electric and diesel vehicles capable of taking power from an overhead pantograph (electro-diesels EDMUs). The proposal was named Project Thor.[19]

In October 2010 it was speculated that 123 additional pantograph vehicles would be manufactured at Derby Litchurch Lane Works, and 21 sets converted, at a cost of approximately £300million,[20] however in 2011 the plant did not have the facilities to manufacture steel carriages,[21] though it was expected that much of the work would take place in the UK, and provide work for the Derby plant.[22] In December 2011 a proposal to electrify 30-35 sets for the CrossCountry franchise, referred to as "eVoyager", was considered by the Department for Transport.[23]