Working in a shop, you generally see a lot of fake coins especially £1's and 10p's. The fake £1's have a slightly darker colour compared to the genuine ones, also, if you take a 20p coin and scratch in the observe field, you will see that it is made of lead. They also wear more easily. You would be surprised how many fake coins there are in circulation..........last night I counted 10 fake £1's out of 110 £1's out of the shop's takings. It's even worse for the 10p's..........around 40% of the 10p's in circulation are fake. The only indication that they are fake is the fact that they have a slightly thin and rounded edge. Compare a few of them and you will see what I mean. We cannot pay them into the bamk so we are either forced to declare them and lose quite a lot of money, or just return them into circulation through giving change. Our rule is that we just give them as change.