British Rail Class 401

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British Rail Class 401
In service 1935-1969
Manufacturer SR Eastleigh, frames from Lancing
Formation power car + driving trailer
Operator(s) British Rail
Maximum speed 75mph 121km/h
Weight Total - 74 tons 15cwt
Prime mover(s) 2 x 275 hp traction motors
total 550 hp (410 kW)
Braking system(s) Air

The Southern Railway (SR) gave the designation 2Bil to the DC third rail electric multiple units built during the 1930s to work long-distance semi-fast services on the newly electrified lines from London to Eastbourne, Portsmouth and Reading. This type of unit survived long enough in British Rail ownership to be allocated TOPS Class 401.