£20 will repay £30 on the 30th UK. Bank transfer

Hi I hate to ask but can anyone loan me £20 till the 30th. I'm a single dad and my Daughter is poorly and could really do with a hand so I can get a few bits from the chemist. I have asked my brother but he is broke till payday too. I can provide payslip etc etc. I don't have PayPal so it will have to be a bank transfer. Thank you in advance to anyone who considers to help