I know this is going to sound really miserable, but I wish it would cool down just a little, I feel so sluggish all the time. Can understand the whole siesta thing now!
I was chatting to a mate of mine and we agreed that if we found people whinging about the heat we'd offer to string them up from the nearest sturdy bough..
You're not complaining about the heat. It's the humidity that's getting to you. Being an island, Britain has so much humid air that a reasonably warm day feels like an absolute belter. If this heat was in southern France or Italy you'd be thinking... hmm, nice warm day, simply because the general level of humidity in the those regions is incredibly low compared to here. This also means that when night time comes, their early hours are comfortable and cool, whereas ours are relatively hot and sticky. Humidity. It's a bugger..!
By the way, another few days/weeks of this and the humidity level will drop and then, despite the temperatures being just as high, we'll all feel much better. As it is, you're in Britain. It won't last, so just enjoy it while you can.

