trailer vehicle and an intermediate motorised vehicle (powered by four EE507-20J of 185 kW carried on the bogies of the MSO vehicle, some recovered from s), all originally built to the standard class 3+2 seating arrangement with 316 seats. Technically, they are formed DTSO+MSO+TSO+DTSO.

Class 455/7

The Class 455/7 units were built in 1984-1985. There are 43 four-car units, all allocated to South Western Railway at Wimbledon depot. They differ from the Class 455/8 in having a revised front end (air horns relocated next to

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