The mercury rose to a scorching 33.3C (91.94F) at Heathrow Airport in west London on Thursday, beating Wednesday's high of 32.6C (90.68F) at the same location. Scotland also had its highest temperature so far this year with the thermometer reaching 30C (86F) in Prestwick.
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Mr Burkill advised anyone outside for prolonged periods of time on Wednesday and Thursday should take measures to protect themselves.
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Feeding the seagulls on Blackpool front
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Shoppers have also been advised to be aware they could be forced to spend extra time in the sun as a result of social distancing measures.
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Ice creams in Cleveleys
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Dr Lynn Thomas, Medical Director at St John Ambulance explained: You could end up in the sun for longer than expected on what would normally be a quick journey, such as queuing to enter the supermarket, so you should be prepared to look after yourself and others.
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Plenty of room in Cleveleys