Everyone from pop star to tv characters. Great place to get these from are: Banknotes
They are very cheap, only £0.99 and are a great novelty gift for people of any age.
Don't try and buy your drinks with them when you go out thou, you might end up coming home early. HAHA.
Who face would you like to see on a £10, £20, or £50 note?
I would like Sponge Bob Square Pants, I think he is great and Mr Crab wouldn't like it. lol