Health warning for London ahead of heatwave

Public Health England says the heatwave could have a "significant effect on health".

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'Don't wait to faint on the Tube' during hot weather

Obviously this is a serious issue for us. The advice as everybody knows travelling on the tube on a very hot day is do take water with you.

If you are feeling faint, if you're feeling suddenly you're going to be taken ill, don't wait to faint on the tube, get off on to the station platform or concourse where someone will look after you.

– Boris Johnson, Mayor of London

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