The number of people in work in London has increased by 100,000, suggesting a big jobs boost from the Olympics.
Unemployment within the UK is now at its lowest level for a year, standing at 2.56 million.
In the three months to June, the number of people in work nationwide increased by 201,000, with half that rise coming in London.
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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.