Ex-London Underground trains to be tested on the Greenford branch line

A mainline rail line in West London will take part in a trial later this year, replacing its existing fleet of diesel trains with former London Underground trains that have been converted to run on batteries.
The trials will take place on the Greenford branch line, which is operated by GWR and mainly runs between Greenford and West Ealing. The line is currently served by a 2-car Class 165 Networker diesel passenger trains, and as the line is unlikely to be electrified any time soon, to reduce po