I went to Keele last year, but left, I hated the course, it just wasn't for me....decided to go to Leeds instead, but in my opinion Lindsay halls were the best, they seemed to be pretty central, campus wise and were pretty decent inside and there's Lindsay bar about 2 minutes away.....so it's great for staggering home. the passport photos will be for your keele card, which is essential for access to the union and Library, and ull need another for ur NUS card....which is handy for on-sight discounts.
although I wouldn't worry because they can take your picture on enrolment day! and ull have ur cards within a week.
The student union is pretty good, I loved sunday nights.....student kareoke etc....Manic Mondays are also pretty good, make sure you go to see the hypnotist, it was one of the best nights out I had at Keele, there was a wicked stand up comedian act too......