The British Rail Class 458 (5-JUP) is a class of electric multiple unit passenger trains built by Alstom at Washwood Heath between 1998 and 2002 for South West Trains. They were the first new fleet of trains to be delivered following the privatisation of British Rail. The order for the original fleet of 30 four-car trains was placed in 1997, and delivery of the first unit followed in October 1998. The fleet entered passenger service between 2000 and 2003 and is maintained at Wimbledon depot. They are part of Alstom's Juniper family of trains, which also includes Classes 334 and 460.