I'll explain what your problem will be: It may be that the UK would let you enter. Your problem is that you have to get there somehow, which will be by air, Eurostar, or ferry. And they check your papers. And they will say: It may be that the UK would let you enter.
Bet we are not SURE that the UK will let you enter, and if they don't, then it gets very expensive for the operator, who will have to take you back to where you come from, and may get fined for letting you on board.
So when your papers are checked, by a company that doesn't take any risks, you will most likely be rejected. Not because you are not allowed to enter, but because they don't want to take any costly risk.