R40028 Ex-Mk1 FO Brake Force Runner BR Departmental DB977352The first standardised railway carriage design built by British Railways, the Mark 1 coach introduced in 1951 could be found across Britain's railway network and continued to be produced until 1963, and even later in the form of multiple units and non passenger stock. Along with being widely deployed, Mk1 coaches were built in various places including Derby, Doncaster, Eastleigh, Swindon, Wolverton and York. Most Mk1 coaches had 63ft 5in long