Here are the instructions for folding a shirt from a bank note. It makes a nice touch if you want to give someone some money in a card.
Fold a shirt or two from a nice background paper and mount them on the card with a little matting and mounting. then slip a £10 folded into a shirt inside.
Any U.K bank note works well, but a bigger note looks better and is slightly easier to fold
If you'd like to send me one - I think the £50 note looks really good as a shirt!