Officially the fastest diesel trains in the world, the High-Speed  Trains were introduced by British Rail in 1976, operating 125mph  services on the Great Western Main Line and the East Coast Main Line  before being introduced to other lines later.

When originally  built by BREL at Crewe Works, the InterCity 125 units consisting of a  pair of Class 43 power units and a rake of Mk3 coaches, were considered  to be diesel multiple units and allocated as Class 253 to the Western  Region and Class 254 for the Eastern Region, as it was envisaged that  the sets would remain in fixed formation.

At the beginning of  April 2006, FirstGroup, having secured the newly combined Greater  Western franchise, unveiled a proposed new livery with a graduated blue  to purple body colour and horizontal dynamic lines. Originally applied  to both coaching stock and power cars, upon refurbishment the power cars received a modified livery of solid blue/purple, minus the dynamic  lines

This train pack features representations of power cars No.  43087 '11 Explosive Ordnance Disposal Regiment Royal Logistics Corps'  and No.43098 in First Great Western plain blue livery.