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
A judge has ruled that the mother of Michael Sandford who is accused of trying to shoot Donald Trump, will be allowed to visit him in jail.
Food prices in a Tesco supermarket were altered as part of a campaign to highlight the unaffordability of houses in London.
The Met Office says temperatures are expected to be highest in East Anglia and down to London.