Do I need to show my cards

[MARK R]

I am in the uk and they do not seem to allow the IWTSTH rule is cash games. The floor always says that the loser does not have to show his hand even if you want to see it. By the way I have never asked to see anyone mucked cards but I have heard it been asked and refused. In MTTS the rule is all cards must be shown at showdown so you cant muck your cards.

Mark.