First Open

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A Mk4 First Open coach in GNER livery pictured at Leeds in 2006
A Mk4 First Open coach in GNER livery pictured at Leeds in 2006

A First Open or FO, is a type of railway carriage used by British Rail. They were first produced as British Railways Mark 1, and subsequently Mark 2, Mark 3, and Mark 4 variants were produced.

[edit] Mark 4

Built in 1988 by Metro Cammell at their Washwood Heath plant in Birmingham, the coaches are 23 m long with power operated sliding plug doors, are fitted with SIG bogies and are capable of running at up to 140 mph (225 km/h) but usually run at a maximum of 125 mph (200 km/h).