If I remember correctly in Great Britain the drivers entering the roundabout yield, in France you yield to the entering drivers. I had fun in England going left entering the roundabouts.
I took my American car over there while in the Air Force, you had to turn your head a little bit more to the right to make sure you weren't entering the roundabout in front of somebody. I really liked the roundabout over stopsigns and stop lights. The British think we are crazy to have stop lights out in the country were you could wait almost a minute with no body coming, they just shake their heads over it.