Perhaps I should explain, the incident I am talking about was a couple of weeks ago, when some genius from the BBC program South Today took a childs toy, painted green and shaped llike and the size of an automatic pistol. It was contained the orginal packaging inside a carry on bag. It either did not show up on the x ray or was missed by the searcher, head of BAA security made the usual excuses, (mind you he was full of excuses while he was in charge of heathrow police station). However the point I was making was it would be difficult to prove an offence against the reporter, as possession of a kids toy is not illegal, no matter that his intention was to prove secuirity inadeqate.
As regards to clock pistols, I know very little but they did set off the metal detectors.