Six artists have unveiled their vision for what they believe should take pride of place on Trafalgar Square's fourth plinth. Here are the first three.
The Dance, by Li liane Lijn
Unmade Monument, by Marcus Coates
Moon Mask, by Ugo Rondinone
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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.