Don't think they're going to waste their time lending out amounts that small.
Don't you believe it.
Let's say I lend you £1 so you can get you can of cheap cider, it's Jolly Giro day coming up, so you can pay me a fiver back. If you don't, I want £20 next week, or else it gets worse. Risking a small amount to get a big amount back, it's bread and butter to the loan sharks on the estates.