We've not had it nearly as hot here in the NW as the SE but it's been humid though judging by other comments it's also humid down South.
I struggle in the heat especially when it's humid but I did punt last Sunday as it was supposed to be the girls last day in Preston, the car indicated it was only about 19 degrees on my way there but it was mid 20's by the time I was driving home
I was sweating like crazy just walking from the car to her incall place despite taking it slowly and thankfully during the punt she had a towel and kept wiping my forehead to stop the sweat dripping
But no aircon and no windows open in the apartment so it was pretty stifling, what the fuck is it in this country that everywhere just seems to concentrate on making sure buildings can be heated up to tropical temperatures but no thought to colling them down

I don't tend to punt as much when it's hot but years ago I did specifically visit Sandys Superstars (Now Temptations) in Manchester as all rooms had air con and you could get relief from the heat; perform properly and get well err relief at the end too