I was wondering how informative CRT's system is. Would it flag if the same number was spotted, let's say, in London and Liverpool in the same week? Because we changed our boats name, and when we rang to update the records we were told you don't have to inform of name changes as all is checked via licence number. Now obviously if no number is displayed I have no idea what they do, but if they've painted a number from a similar boat, that might buy them some time.