In pictures: Hottest May day record broken in UK
Getty ImagesThe UK has recorded its hottest-ever May temperature as the mercury rose to 33.5C in London.
Heathrow, west London, broke the record on Monday, with temperatures in the mid-to-high 20s away from the south-east of England.
BBC Weather said highs expected in parts of the UK on Monday and Tuesday could exceed top temperatures in Lagos, Cairo and Ho Chi Minh City.
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BBC Weather Watchers/ Lucie Johnson
BBC Weather Watchers/ Walking Tractor
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BBC Weather Watchers/ Linda's Local
BBC Weather Watchers/ Pauls Camera