I've encountered cops in UK, on the wrong side, they are rough AF. I didn't fight back, just did as I was told. So hard to take this approach because all of their actions are provocative, pushing you to give them the excuse to beat the living daylights out of you. They are a nasty piece of work.

All worked out in the end, they let me go and apologised (only because I didn't lose cool). FKN tossers!