28.5C upstairs 26C downstairs.
I may well think about getting air-conditioning for the upstairs of my house at some point.
Awful trying to sleep in that heat. Worst I had was when we had a full on week of 35C and over in 2020 - It got to 32C upstairs in my house.
Diabolical that was.
TBH the air-source heat-pump marketers are missing a trick here - an ideal system would include the ability to run in reverse, i.e. act as an a/c in summer as well as providing heating in winter.
It's noteworthy that several posters on here now either have or are considering a/c - a sign that I'm not alone in finding temperatures in the high 20s and upwards unbearable for sleeping! I'm on my third portable a/c now, the first one died and I gave the second to a friend as it wasn't powerful enough. The latest one did a sterling job in the heat a couple of days ago.
No need for a/c today, however. I got it down to 23C both up and downstairs yesterday before closing the windows (just as well with all that torrential rain) and this morning, with all the windows open, it's a pleasant 19C both up and down.