The British Rail Class 90 electric locomotives were built by BREL at Crewe in 1987-1990, weighing 84.5 tonnes and with a top speed of mph (). They operate from 25 kV AC overhead lines and produce . The class is employed on express passenger and heavy freight trains. Their main passenger roles include the Caledonian Sleeper, the ex-Virgin trains Mark 3 set and the Greater Anglia services from London to Norwich. Freight operations are with DB Schenker and Freightliner on a mixture of roles mainly on the West Coast Main Line and the Great Eastern Main Line.