Hi Cutie!
I don't know if you guys have these stores or not since I am in the US, but we have a chain of dollar stores called Dollar Tree and everything there is a dollar (I guess that would be pound to you??) Maybe they call it the Pound Palace there LOL!!
Anyway, ours have these really cool packs of "nail tattoos". They are pretty much water decals, but they are kid oriented. They have some that are glittered designs and plain. The pack has about 12 different sets of 10 and you get 2 of each design so it will do about 24 sets!! They also have these gem design stickers that has one for each nail.
I do manicures on a mentally challenged girl every week as part of her therapy, if she is good, she gets to come, if not, she has to skip a week. Well, she LOVES nail art. I love to do freehand, however, she doesn't sit very still for that so these work great on her.
Hope you have those stores!!!