British Rail Class 122
The British Rail Class 122 diesel mechanical multiple units were built by Gloucester RC&W in 1958. Twenty single-car, double-ended driving motor vehicles, nicknamed "Bubble Cars", were built, numbered 55000–55019. These were supplemented by nine single-ended trailer vehicles, numbered 56291–56299.
Initial use
The Class 122s were built mainly for use on the London Midland Region of British Rail, although some were also used in Scotland. They were used on a variety of lightly used lines, many of which were closed during the Beeching Axe in the 1960s. Routes served included the Stourbridge Town and St Albans Abbey branch lines, as well as local services between Dundee and Arbroath..| Lot No. | Type | Diagram | Qty | Fleet numbers | Notes |
| 30419 | Driving Motor Brake Second | 539 | 20 | 55000–55019 | |
| 30420 | Driving Trailer Second | 538 | 9 | 56291–56299 |
Parcels use
Three Scottish Region cars were converted to carry parcels traffic and were reclassified Class 131, though the vehicles themselves were not renumbered.Usage after passenger service
Upon privatisation of Britain's railways, the Class 122 fleet has been withdrawn from normal service. However several units were operated by EWS and Network Rail in departmental service, reclassified as Class 960.| number | former number | use | disposal/current use | cut up date |
| TDB 975023 | 55001 | Route learning car | Preserved | |
| TDB 975042 | 55019 | Route learning car / Sandite | Stored on the Llanelli & Mynydd Mawr railway in Cynheidre, Carmarthenshire, set 960 015 / 55019 has now entered Preservation | |
| TDB 975227 | 55017 | Route learning car | Vic Berry | 2/89 |
| 975309 | 55008 | Route learning car | Mayer Newman | 11/84 |
| TDB 975310 | 55010 | Route learning car | Mayer Newman | 6/84 |
| TDB 975540 | 55016 | Route learning car | MC Metals | 7/93 |
| TDB 975994 | 55014 | Test & stores car | Vic Berry | 10/88 |
| 975998 | 55013 | unknown | Mayer Newman | 3/82 |
| TDB 977177 | 55015 | Route learning car | MC Metals | 7/90 |
| TDB 977223 | 55007 | Route learning car | MC Metals | 6/91 |
| 977941 | 55012 | Route learner | Loadhaul then EWS. Stored non-operational at Thornaby TMD from 1998. Purchased privately for preservation in 2009 |