look into internships, but most are unpaid (******* exploiting dickheads) but really thats if your wealthy and your parants can help you. if not then really i think maybe work in retail (i know the best thing)......use the year to improve your portfolio and maybe attend fashions shows like london fashion week or birmingham clothe show or any private viewings or events you could get into. go and ask your foundation tutor advice on what to do, they probably had loads of students like you in the past, unsure what to do in thier gap year.
im sort of in the same positions as you, im thinking of a gap too but erm being from a poorer background, it seems a lil too complicated, having to constantly worry about whats going to happen and what is the best thing for me. i looked into internships and i dont like the way is set out. its just unfair. well good luck to you, hope it goes well and you know what? really a gap year is to spend time on what you want to do.