The British
Rail Class 455 is a type of
electric multiple unit
drawing power from a 750 V DC
third rail. Built by
BREL at
York works in the early
and mid-1980s,
they are used on suburban services in South
London, by
South West Trains and
Southern. The three
batches of Class 455 units, all formed of 4 cars: driving carriages at each end,
an intermediate trailer vehicle and an intermediate motorised vehicle, all with
standard class (i.e. 2nd class) 3+2 seating. They have the same body shell as
the
Class 317 and
Class 318, though they
were designed for inner suburban services they do not feature first class
seating or toilet facilities and are restricted to 75 mph.