Well, I have returned to England safely. It is now 5am on Tuesday, and somehow I have just woken up. My sleep schedule is a little off, but it doesn't seem too bad. I went to bed at 10pm, which would be a normal time. I expected I might wake up much earlier, like at 1am or something. If I can go to bed around 10 tonight as well, that would be great.

I didn't have any problems entering the UK with my new work visa. Seems like everything is finally in order.