39-413 BR MK2A BFK Brake First Corridor BR Regional Railways Coach 35516 (with fitted passengers) - WeatheredBR MK2A BFK Brake First Corridor Regional Railways Weathered British Rail's second generation of Standard Coach design is known as the Mark 2. Design and construction followed on from the universal and ubiquitous Mk1 family of coaching stock, with the prototype example built in 1963. Series production continued until 1975 at Derby Carriage Works. They were of steel construction, and of a more monocoque design than the Mk1, which added to their safety