Tuesday is set to be even hotter than Monday's record breaking heatwave with temperatures soaring to 36C.The Met Office has warned that sweltering temperatures could reach up to 36C in the south east of England by 2pm on Tuesday - just a day after Britain recorded its hottest ever May day.A searing 34.8C was recorded in Kew Gardens, south-west London, exceeding the previous hottest May day of 32.8C in 1944 - as well as the bank holiday record of 33.3C in August 2019.The Met Office said the 34.8C heat is 'exceptional in the UK even in mid summer, let alone in May'. Up to nine counties saw record breaking temperatures today amid a 'historic' 35C bank holiday heatwave in Britain. Tens of thousands of Britons flocked to the coast and beauty spots to bask in the blistering heat despite official government guidance to stay out of the sun during the hottest times of the day. Wales saw its hottest ever temperature in May on Monday evening, with 32.2C recorded at Hawarden Airport in Flintshire. The previous record of 30.6C in Newport stood for 82 years.Greater London, Surrey, Norfolk and Oxfordshire, saw temperatures soar above 32C - and the Met Office forecasts the mercury could yet climb to 36C tomorrow.