There is one major risk of riding in the UK - being on the other side of the road on a single track machine. It's the major reason I never went back to bikes after we came to the US. I rode other folks' bikes off-road a couple of times and my "opposite-hand" reactions really bothered me. In a car, you're sitting on the other side, so you get a continuous reminder that things are opposite-hand.
It sounds as though you spend quite some time in the UK on a regular basis, so this might not be an issue for you.