I don't really regret anything. I couldn't be reasonably expected to do anything more. Everything went well, except for this one question, this one History question... There simply weren't any interpretations for it in the book! Even if I had known the question beforehand, I don't think I could have done much better than I did. I was fortunate to have memorised all the theoretical and general arguments, but I didn't have any specific names of all the splinter factions. I hope it won't be a big deal.
The thing that gets me though, is that a couple people somehow knew that that question was going to turn up. Despite it being a reformed A-level, they decided to look through the old spec past papers, and they concluded that this would show up because they'd never asked anything about it before. I think they just got lucky on a risky guess.