Yup.
I tried to buy a drink in Wetherspoons with one.....:o(
The Queen's head (printed in white) came off when scratched, other than that it looked pretty darn genuine to me when I received it in my change from a shop round the corner.
No. It was handed back to me with an explanation of why it was an obvious firgery..... I took it home and took the scissors to it to make sure beither we nor anyone else would be fooled by it again.
However, I *always* scratch my nail across the Queen's head on notes I receive in my change now.