Britain has boiled on its hottest ever June day after temperatures reached a blistering 35.7C. The 50-year record was broken this afternoon in Charlwood, Surrey, when the mercury surpassed the 35.6C equalled in 1976, the Met Office said, when the country was in the midst of a ten-week heatwave. Forecasters had predicted that the June record would be 'absolutely smashed' with Britain and Europe trapped in a 'heat dome'. Scotland has recorded its hottest day of year after temperatures reached 29.4C in Dyce, Aberdeen. The record-breaking day had earlier cancelled a climate conference to tackle extreme heat, and it could get even hotter as Britons brace themselves for temperatures of 40C this week. The climate session on extreme heat at the London School of Economics was pulled as the building 'does not have any cooling mechanisms in place'.The event was scheduled as part of Climate Action Week, but the Zurich Climate Resilience Alliance said: 'We cannot risk the wellbeing of speakers or guests by subjecting everyone to very unpleasant indoor conditions in addition to hot journeys to the venue.'The All England Club was also forced to suspend Wimbledon qualifying after the automated line-calling system suffered a heat-related meltdown.Players were taken off court after it was decided chair umpires could not make line calls in the absence of the electronic system and, unlike in the main Championships, there are no reserve line judges available during qualifying.Wimbledon replaced human line judges with Hawk-Eye Live last year, though the technology has faced scrutiny before.Similarly, a water park in Hertfordshire has had to close its doors because it is too hot - the venue stuck a sign on its entrance today stating: 'It is advised that people DO NOT leave their homes. 'Due to the synthetic surface in the splash park, the ground may become extremely hot during periods of high temperatures and could cause burn to the skin.' It comes after a rare red extreme heat warning came into force for just the second time this morning, covering London, parts of the Midlands, and south-east Wales.The Met Office has since extended it by three hours until 11.59pm on Thursday and to other southern areas across Dorset, Hampshire and Sussex. LONDON: Sunbathers fan themselves in Battersea Park today LONDON: People shelter from the sun under an umbrella on Windsor High Street DERBYSHIRE: Hollie Jackson, 24, and Callum Hurley, 24, take a dip as they enjoy the warm weather and the heatwave conditions at Hathersage Swimming Pool, in the High Peak -- June 24, 2026 KENT: People sunbathe on Viking Bay beach as the UK is set to experience its hottest day in June on record during a heatwave in Broadstairs LONDON: Rail passengers arrive at Waterloo Station in the morning rush-hour, as Britain experiences record temperatures disrupting schools and transport networks