No, I wouldn't get a loan if I was you and I'm not sure you could get an actual loan being on benefits or even for such a small amount.
The benfits agenct have what is known as a 'crisis loan' where they can give you an amount of money to see you over and pay back weekly or even a 'social fund' although I think this takes more time.
Is there no one you can borrow this money off until you get your next payment, a family member or friend maybe.
You could also ring the bank and explain your circumstances to them, ususally they are happy to help, but they can't help if you don't tell them.
I would call the bank first, personally, then ask around for someone to lend you until payday.
HTH, GL
"YOU KNOW I THINK I RECOGNISE YOUR FACE, BUT I'VE NEVER SEEN YOU BEFORE!" Noel Gallagher.