The Class 67 locomotives are a class of Bo-Bo diesel-electric locomotives that were built for the English Welsh & Scottish Railway (EWS) between 1999 and 2000 by Alstom at Meinfesa in Valencia, Spain with drive components (engine, generator and traction motors) from General Motors' Electro-Motive Division.

Unlike the Class 66, the traction motors are frame mounted rather than axle hung to reduce unsprung mass and the gear ratio is increased allowing higher speeds.

Initial plans were for a rapid acceptance into service, however, problems with the locomotives being slightly out of loading gauge[7] caused delays.

In April 2015, GB Railfreight commenced a contract to haul the Caledonian Sleeper with 67004 repainted and renamed for use on the service.

When GB Railfreight started to provide the trains and crews for the Serco franchise in 2015, it was planned to use rebuilt Class 73/9s.

[25][26] In December 2018, these two Class 67s were included in a sale of 67 France and UK based locomotives to Beacon Rail Leasing.

[31] These Class 67s have been fitted to allow Push-Pull operation with the rakes of British Rail Mark 4 coaches with a Driving Van Trailer at the opposite end to the locomotive.

[42] On 12 October 2007, 67029 was named Royal Diamond at Rugeley Trent Valley railway station, in honour of the 60th wedding anniversary of Queen Elizabeth II and Prince Philip.

In January 2010, 67018 was repainted into DB Schenker red with a maple leaf and named Keith Heller at the National Railway Museum.

[48] In 2011, 67001–67003 were repainted into Arriva Trains Wales blue livery, although without any company decals, for use on the daily Cardiff-Holyhead service.

This, along with similarly repainted 67010, was used on the non-electrified parts of the Serco Caledonian Sleeper until the release of sufficient Class 73/9s for use by GB Railfreight.

[50] In June 2017, Colas Rail duo 67023 and 67027 received the names Stella and Charlotte, respectively, on nameplates carried centrally on the bodysides.

The mail train, hauled by 67002 "Special Delivery" with 67012 at the rear, was travelling at 50 miles per hour (80 km/h) when the incident occurred.

[52] In 2006, Hornby Railways launched its first version of the BR Class 67 in OO gauge range in a variety of liveries.