zMdlnd Pllmn Mk3 1st OpnM41059HOR R40168 Hornby Midland Pullman, Mk3 First Open, M41059 Era 11 In order to allow running at 125 mph on Britain's Victorian era railways, new rolling stock was needed by British Railways. Significant improvements over the Mk2 included new secondary air suspension between the bogies and the coach body as well as aerodynamic skirting on the underframe. Mk3 coaches are 75ft (23m) long enabling far greater capacity than older coaches. Mk3 coaches also