I live in the UK - London too, in a flat in a nice part but no garden. We’ve been in lockdown since forever (feels like it at least...) and this particular one since December. I’ve been avoiding taking leave until after now as was waiting for things to open up. It was my birthday yesterday, as well as Good Friday bank holiday thus a long weekend. When I woke up I was so crushingly exhausted I could barely move. I haven’t stopped since mid December, and also had covid over NY.
I think this is a good thing because it forces people to stop. People need breaks and if pushed too hard something will give eventually. I’m ok now, got through yesterday. But it was a wake-up call.