Michael Easton, from Holland Park is still missing following a trip on a crocodile infested river in India, which left a friend dead. Authorities are continuing to search the area around the Cauvery River near Bangalore. Ian Turton, from York, died during the excursion.
More top news
The high of 35C was recorded on a Bakerloo line train between Piccadilly Circus and Oxford Circus at 2pm.
Weather forecasters say temperatures could reach 35C, beating the previous record of 34.6C in the scorching summer of 1976.
After years of political manoeuvring over the future expansion of Heathrow Airport, there has been an important development this lunchtime.