37421 3z02 Derby RTC - Carlisle Wapping Sidings Test train, Sun. 2nd October 2016
37421 & 37057 Pass Lancaster On Derby RTC - Carlisle High Wapping 13/02/18
Colas Railfreight 37421 Thrashes Passed Longton Working 3Z03 Stockport - Derby RTC
Colas Rail Freight 37421 - 3Z01 Norwich-Derby RTC 20/09/2016
Broken 97303 on 3Z01 + 37254 on 3Z02 08/01/2023
37219 3z02 Derby RTC - Carlisle Wapping Sidings, Sun. 17th July 2016
37057 tnt 37421 1Q47 1051 Derby R.T.C.(Network Rail) - Sellafield - Carlisle High Wapping Sdgs
Colas Tractor 37521 3Z02
37603/9701 3Q16 Kilmarnock - Derby RTC Test Train, 20th January 2014
37099/37421 1Q83 Carnforth H.S. - Derby RTC Test Train, 23rd March 2018
37421/37521 1Q83 Blackpool North - Derby RTC Test Train, 15th June 2018
37116/37421 1Q18 Blackpool North - Derby RTC Test Train, 13th July 2018
37254 Willington 8th January 2023 3Z02 14 00 Derby RTC Carlisle
Colas 37421 moves north out of Carlisle station
Class 37 37612 - 3Z02 - Colas Rail Test Train passes Ketteringham, Norfolk 02/05/23
37421 on test train duties tonight
37612 37421 37099 Spondon 9th January 2023 07 46 RTC Nottingham
37409/37424 5z01 Carnforth D&UGL - Derby RTC, Sun. 2nd February 2020
DRS 37611 working 3Z02 Derby RTC to Carlisle High Wapping Sdgs @ Crewe 01/3/15
37175 + 9708 On Derby R.T.C.(Network Rail) to Cardiff Canton Sidings
37602/37608 Derby RTC - Mossend Yard Test Train, 10th May 2016
37057 3z17 Carlisle - Derby RTC Test Train, Sun. 28th August 2016
37219 & 37521 passes Darlington - 0Z21 Derby R.T.C. to Millerhill S.S.
37604 6Z00 Derby RTC - Slateford depot 21st November 2013
Colas 37521 thrashes Berkhamsted on an Ultrasonic Testing Unit to Derby RTC - 6th January 2018
