When Boris Johnson was re-elected mayor ten months ago, he promised to dedicate himself to London and to Londoners. But today he's being accused of shirking that duty by devolving his power to his staff. There are complaints that he's not taking his job seriously. Simon Harris reports.
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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.