I noticed these marks on note a while ago but only after seeing Hobbes' thread could I be bothered to take some shots. They're only quick ones. I may take some better ones at some point. The main image is a close-up of the money and the note itself is the little picture. The red dot shows where the close-up was taken. In the preview window I've noticed the £10 and £20 don't have dots. They're all from the bottom right just like the £5.