The British Rail Mark 3 coach was developed primarily for the Class 43 HST, but incorporated design features to enable it to be hauled by conventional locomotives. The first coach entered service in 1975 and the last were made in 1988. Most Mark 3 coaches built are still in service today, including on the Royal Train.

Dapol Models several mark 3 coach styles and livery options, including some twin packs and all have the following features:

• Highly detailed body, underframe and bogies
• Innovative Light Bar Feature were an optional Dapol light bar (yellow for incandescent or white for modern discharge lighting) can be easily fitted.
• NEM Coupling as standard
• Fine application of livery including complex modern graphics