if you're a student, a lot of banks (here in northern ireland at least) run student accounts with debit cards, so you don't need to earn over £1000 per month.
Try to get one that pays a decent amount of interest too, guys like smile, halifax and egg (online) pay 3-4%, which is better than 0.3% (damn northern bank, and i'm too lazy to switch).
feline/jonathan had great advice too, about the free overdraft etc.