No, but your question was whether anyone has done this before. Obviously some people have; some people spend Christmas Day alone, some people spend the entire Christmas period alone, some people spend (at least) five hours alone every day of the year.
@FourFiveEightNine @DBSFstupid
I think the reason you're getting a little bit of pushback (perhaps unfairly, as I do appreciate this is a site primarily for people with children) is that those who aren't lucky enough to have a partner and family, and who are possibly facing the imminent prospect of a lot of solitary time over Christmas, get a bit fed up with this sort of question (which I've seen multiple times on MN) as if spending time on your own (especially during a holiday period) is a completely outlandish thing to be doing - plus the inevitable scores of replies expressing glee at having time away from family. This is obviously not your problem/fault, but it can be a bit of a sore point, especially at this time of year.
Personally there isn't a single day of the year, including Christmas Eve, Christmas Day, New Year's Day, my birthday, when I haven't spent five hours on my own at least once and probably multiple times.
As a PP said, it certainly highlights how different everyone's lives are.
My semi-serious suggestion: watch or listen to Götterdämmerung (it lasts c.5 hours).
More serious suggestion: go into London yourself and find a play or concert to go to.