Sir, – In 2022 the UK has experienced its highest temperature on record,1https://www.metoffice.gov.uk/about-us/press-office/news/weather-and-climate/2022/red-extreme-heat-warning-ud. while frequency of operation of the Thames flood barrier has continued to increase, at more than three times per year in the last ten years compared to just 12 times in its first decade of service in the 1980s.2https://www.gov.uk/guidance/the-thames-barrier#thames-barrier- closures. I have not included the outlying period 2013–2014 which saw 50 operations within 12 months – were I to do so, the average would jump…