Your open to be searched at any time although the officer should have reasonable grounds, am not a police officer so cant quote chapter and verse.Welcome to the forum and greetings from sunny, dry Arizona salop sniper!
Just one question: what are the stop-and-search laws there?
How ever there are so few police in the uk and they are so thinly spread with so much paperwork etc that your unlikely to ever get stopped unless you have done something or drawn attention to yourself.
In some areas in a bid to stop knife crime the police will do random stop and search`s in a bid to get knives off the street (you cant just have a knife or anything that is or could be used as or conceived as a weapon). Personally I have nothing to hide so have no problem with being searched and I would also be suspcious of anyone not wanting to be searched as I would feel they had something to hide.
As a legal & licensed shotgun and firearms holder in the UK I have to tell you that generally it feels like 98% of our population would prefer it if no one other than the military had firearms and enven less of the police than what we have currently, the UK is not a gun/firearm friendly place sadly and it is very much a nanny state am very sad to say.