Haven't applied for student finance yetWatch
Get a student account with an overdraft to help tide you over until your payment comes through. Speak to your parents about a short term loan to tide you over or if they will help with some of your costs (travel tickets so you can get home to see them, supermarket loyalty vouchers...)
Speak to your university about bursaries and hardship funding. And jobs...the canteen/bar is often well paid and not intrusive (plus you can give your mates extra chips).