LONDON, June 26, 2020 (Xinhua) -- People walk their dogs in Queen Marys Rose Gardens at Regents Park in central London, Britain, on June 25, 2020. Britain on Thursday experienced its hottest day of the year so far, with temperature reaching 33.3 degrees Celsius at Heathrow Airport, the Met Office said.

.LONDON, June 26, 2020 (Xinhua) -- People enjoy the sunshine in Queen Marys Rose Gardens at Regents Park in central London, Britain, on June 25, 2020. Britain on Thursday experienced its hottest day of the year so far, with temperature reaching 33.3 degrees Celsius at Heathrow Airport, the Met Office said