Divers Tom Daley and Pete Waterfield will bid to continue the British medal success of Lizzie Armitstead and Rebecca Adlington today as they compete in the synchronised 10m platform final.
British fans inside the Aquatics Centre will hope to see Daley, 18, win an Olympic medal to add to his decorated young career so far.
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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.