Mervyn Kohler, special adviser to charity Age UK has told ITV London that heat can be "stressful" for older people, as scorching temperature continue across the UK.
Mr Kohler said: "For God's sake, let's enjoy it, you have to act sensibly and responsibly, and enjoy the warm weather".
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Mr Khan said the image of an Asian woman on a see-saw with an aggressive finger-jabbing white skinhead reinforced stereotypes.
The Central Line's from Essex, the Bakerloo Line is beginning to show its age and the Piccadilly Line is tourist glad to be in London.
The bitter war of words goes from bad to worse.