British Rail Class 458

The British Rail Class 458 Coradia Juniper (4-JOP; later 5-JUP) is a class of electric multiple-unit passenger trains of the Alstom Coradia Juniper family, built at Washwood Heath between 1998 and 2002 for South West Trains. 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 Bournemouth depot.

Between 2013 and 2016, the class was merged with the mechanically similar Class 460 fleet and extensively rebuilt to form a fleet of 36 five-car units—designated Class 458/5—to provide an increase in capacity on services into London Waterloo. The trains are now used by South Western Railway.

In March 2021, South Western Railway announced that 28 Class 458 units would be refurbished for use on long-distance services on the Portsmouth Direct line, as a result of the company deciding to abandon its original plan to use upgraded Class 442 units for this purpose. By 2024, this plan had been dropped, and the refurbished units were instead deployed on limited services out of London Waterloo from 24 June 2024.