Britain's top rowers will be finding out shortly whether they've made the grade for London 2012.
The British Olympic Association is holding a press conference at 2pm, at which it will reveal which athletes have been chosen for Team GB.
Mark Hunter, shown below, is one of those hoping to be named for the squad.
He won a gold medal at the 2008 Beijing Olympics in the lightweight men's double scull with his partner Zac Purchase.
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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.