I don't know anything about England, other than how it's supposed to be good fun if you insult the local soccer team, but I can say that going on trips by yourself can be both lonely and enjoyable. That's okay, though, really, because going on trips with a friend can be both annoying and enjoyable.
The positive is that you can decide where you want to go at any point during the day, including just wandering around, and you get to eat where you want. That's a pretty darn good positive, honestly.
It's also a good self-confidence builder. I mean, you're never going to see most of the people you mean again in your entire life, so what if you screw up? Be calm and assertive because there really is no need to worry about perception. Pretend you're James Bond and you're on a mission.
