Conservative members of the London Assembly walked out of a meeting at City Hall this morning after the Chair Jennette Arnold refused to let one of them ask a question about Labour's policy on welfare changes.
The Assembly was questioning Kate Bell of the Child Poverty Action Group about the welfare reforms but Ms Arnold felt that a question from Conservative member Andrew Boff was inappropriate because it made a political point.
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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.