ScotRail was the trading name providing a distinctive brand for the British Rail network in Scotland, first adopted on 22 September 1983, under manager Chris Green, British Railways Scottish Region. ScotRail was the final brand of British Rail passenger services to operate prior to the privatisation of British Rail, with the ScotRail franchise being signed over to National Express on 31 March 1997.

The British Rail Class 305 was an alternating current (AC) electric multiple unit (EMU). Under the pre-1973 British Rail numbering system, the class was known as AM5; when TOPS was introduced, it became Class 305.