Three Scottish Region cars (55013-55015) were converted to carry parcels traffic and were reclassified Class 131, though the vehicles themselves were not renumbered.
Current Operations
Upon privatisation of Britain's railways, the Class 122 fleet has been withdrawn from normal service.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 (previously Railtrack) in departmental service, reclassified as Class 960. These are listed below:
Unit No.
Vehicle No.
Livery
Operator
Use
Status
Departmenal No.
Former No.
01
975023
55001
BR Blue
Railtrack
Sandite/Route-learning unit
Sold for preservation in 1995
122012
977941
55012
Load-Haul
EWS
Route-learning unit
Stored in 2002
960015
975042
55019
NR Yellow
Network Rail
Sandite unit
In traffic
Preservation
"Bubble Cars" have proved popular for preservation on heritage railways.
The BritishRailClass121 diesel multiple units were built by Pressed Steel in 1960.
Upon privatisation of Britain's railways, the Class121 fleet was only operated by one passenger company, namely Silverlink, with several more units in departmental duties with Railtrack.
The units replaced the previous fleet of Class108 and Class 115 units, and were supplemented with a fleet of Class 117 units cascaded from Thames Valley services.