The Iconic Class 303 – Glasgow’s Beloved “Blue Trains” Few trains are remembered with as much affection in Scotland as the Class 303 electric multiple units. Introduced in 1960 for the newly electrified Glasgow suburban network, these trains marked a bold step into a cleaner, faster, and more modern railway age under British Rail. Nicknamed the Blue Trains thanks to their striking Caledonian blue livery, the Class 303s transformed everyday travel around the Clyde. With their smooth acceleration,