GWR starts west London trials of a battery-powered train to replace diesels

For the next few months, an old London Underground train can be seen running along a length of National Rail track in west London, as it tests a new battery technology that could replace diesel trains on branch lines.
Test train at West Ealing (c) ianVisits
The former London Underground train had been bought by a start-up firm created by Chiltern Railway’s former managing director, the late Adrian Shooter, as a way of providing affordable trains for use on branch railway lines. However, th