UCAS help pleaseWatch this thread
Secondly, i'm taking a gap year, when do i apply for student finance, this year or next year?
Accept the uni offer you want and then drop them an email advising that you will be living at home rather than in residence halls. They will take you off their list and the job's done. If in years 2 and 3 you want to apply for uni halls then there will be a process. If you want to move out with your mates, the uni does not need to know.