British Railways Mark 2

British Rail Mark 2
First ScotRail Mark 2 at Euston, part of the "Caledonian Sleeper"
In service	1964-present
Manufacturer	BREL
Built at	Derby, England
Constructed	1963 - 1975
Entered service	1964
Number built	1,876
Operator(s)	Arriva Trains Wales First ScotRail Network Rail
Specifications
Car body construction	Steel Semi-integral
Car length	64 ft 6 in (19.66 m)
Doors	Hinged slam, centrally locked
Maximum speed	100 mph (161 km/h)
Train heating	Pressure Ventilation Air Conditioning (1971 onward)
Braking system(s)	Clasp, pneumatic
Track gauge	1,435 mm (4 ft 8 ^1⁄2 in)

British Rail's second design of carriages was called Mark 2. The Mark 2 has more strength than a Mark 1 in the event of an accident.