Sirius, I have one more question for you (or anyone else who might be able to answer this for me): I want to go back to London next week to get some of my things and arrange what I'm going to do with my flat for the year. When I enter, I will have to enter as a tourist which means my visa is going to be canceled. You might have answered this before, but I just want to double check: this isn't going to have any affect on my getting another Tier 4 next September, will it? I'm horrified of jeopardising anything, so if it's better that I don't go back to London for a few weeks, I won't.
Also, I might renew my passport before I go back because it's going to expire in May so the new one won't have the Tier 4 visa page. Will I still need to tell them that I have one, but want to have it canceled? This is probably a stupid question, but I'm incredibly paranoid about everything after this experience.