If you read certain threads here, you will see how security in the UK doesn't really know their own rules and is generally staffed by a bunch on incompetent underpaid monkeys.
Do not hesitate in having police summoned if that happens to you a next time.
Take the name of the people that has treated your rudely, including supervisors. They will refuse, you insist - again in presence of the police.
Tell them that you will write a formal complain, (to which they invariably reply that they don't care) - then write the complain for real at that point they may indeed be replaced, as monkey labour is cheap.