Are you a student? If so overdraft on your student account is the best option as it's usually interest free.
You won't get a loan, and if you did it'd be a really bad idea - how do you expect to repay it?
Some credit cards will offer you X months at 0% interest when you join them. For example, I recently signed up with Nationwide to get a credit card with a limit of nearly £3k, and for the first 6 months I only have to pay off £25 per month and no interest builds on anything I've spent. Now this is perfect for me - I got it in mid-November whilst unemployed and desperately needing money, but knowing I had a well paid job come January. I've built up about £1k on it so far, and will need to continue to use it until I get paid at the end of January, but I am 100% confident I will pay all of that off before the 6 months is up. The bank only let me have it because I could prove I had a job lined up though. So you may have to go to not such a good provider who lends to high risk people such as yourself, and you may find they don't do such a good deal.
Another option is an overdraft on your normal account - a very good idea if you've got direct debits coming out as the interest you'll pay is nothing compared to the charges if you miss payments on DDs.
DO NOT GET A PAYDAY LOAN. You don't have a payday, and will not be able to pay the money back when expected. Interest rates are horrendous on these (over 1000% APR - so if you borrow £2000 you'll end up owing £20,000 - yes, twenty thousand pounds - after 1 year). They are supposed to tide you over to the end of the month, and are NOT SUITABLE FOR SOMEONE IN YOUR POSITION!!