Completed at the end of 2024, Porterbrook financed the refurbishment of South Western Railway’s (SWR) fleet of Class 458 vehicles.
The £25m upgrades were completed at Alstom’s Transport Technology Centre in Widnes, with each of the 28 4-car units taking two weeks from start to finish.
Following the enhancements to the interior and exterior, each train had new SWR livery, modern seats in a two-by-two formation – all with back tables and charging points – as well as space for two wheelchair users. The carriages also had new carpets, and tables fitted with wireless charging points.
To enable faster acceleration, the vehicles were reconfigured and the Class 458’s powered wheelsets overhauled to give an increased top speed of 100mph.







