Bedford Cauldwell Walk depot,[note 1] is an electric multiple unit maintenance depot located on the Midland Main Line in the Cauldwell district of Bedford.

[4] In the early 2000s the construction of phase 2 of the Channel Tunnel Rail Link required a 25-week closure of the railway line between King's Cross and Kentish Town; this blockade would prevent easy access of trains of the London-Bedford line to their traditional servicing facilities at Selhurst depot in south London.

[14] The delivery of the class 377 trains was delayed by a year, and the initial Class 377/5 was returned to the manufacturer due to the number of faults found, resulting in a further delay to introduction of the fleet.

[15] In September 2019, with the cascade of new rolling stock having displaced all Class 319 trains from Thameslink services, the Depot ceased to be a maintenance Depot, although it continued to be used for cleaning and train presentation servicing.

[16] In 2021, Rolling Stock maintenance work restarted at the Depot, when Siemens, working on behalf of East Midlands Railway, began to use the depot to maintain its fleet of Class 360s, used on London St Pancras to Corby services.