People familiar with UK candy brands: What kind of candy bar should I treat myself with after finishing my taxes?

I am in the UK (but clearly American, as I am doing my taxes right now) and am not familiar with UK brand candy. Do you have any suggestions on what kind of candy bars are good around here. No Cadbury Creme Eggs: those sick me out.

Usually I am on the ball with this stuff and have my taxes done by mid-February. This year, not so much. I’m dreading doing them.