I'm not sure if you're just being disingenuous but the title says 'as temperatures in UK near 40°C', not specifically at the location of the runway, which I guess is overtly incorrect in the sense that it's an understatement, as it exceeded 40C at multiple places today.
>Heathrow Airport was the first place to break the 40C mark, hitting 40.2C at 12:50 BST but several other places also passed 40C during the afternoon, including Gringley on the Hill in Nottinghamshire and St James's Park, Kew Gardens and Northolt - all in London.
This article has at least some stats about hottest days going back before the 30's: https://www.rte.ie/news/weather/2022/0719/1311135-uk-hottest...