The British Rail Class 50 was a class of 50 diesel locomotives designed to haul express passenger trains at 100mph. Built by English Electric at their Vulcan Foundry in Newton-le-Willows between 1967 and 1968. The class was primarily built for working passenger services on the West Coast Main Line (WCML) north of Crewe to Preston, Lancaster, Carlisle, Glasgow and into Scotland.
British Rail's Railfreight sector gained an iconic livery scheme in 1987, which has since become celebrated as one of BR's most daring and unique identity strategies.
The sector was divided into six divisions, each with a special division-specific bodyside logo, placed on top of the two-tone grey locomotive paint scheme. The designers, Roundel Design Group, specifically chose bold colours and geometric shapes, taking inspiration from Second World War aircraft insignia, and aiming to create a 'squadron' feel to each sector.
This design is based on the livery fitted to all Railfreight General locomotives (although this was the least-applied of all Railfreight sector identities).