The London Underground wants to harness heat accumulated to help warm hundreds of homes. The project, which is the first of its kind in Europe, could even help reduce spiralling energy bills.
Dan Hewitt reports:
More top news
Record crowds are at this year's Pride in London parade as people show their support for the LGBT community after the Orlando shooting
The Lewisham and Greenwich NHS Choir opened the second day of music at Galstonbury's Pyramid stage at the world-famous festival.
Detectives from the Met Police are interviewing the mother of a five year old girl who was found abandoned near Brighton train station.