No, You do not need to register with the UK police, and they prob wouldnt have a clue what they are anyway. Just don't go carrying them around it could land you into trouble unless you have a good reason.
your friend just pulled that out of his bunghole, hes the type of person who waits til you buy something then comes around and tells you that he could have gotten it cheaper. his personality is about trying to control people through lies like that retard conman.
Edited by zeke79 - Let's keep political opinions to ourselves.