British highways are really good and have definitely better surface than Californians,
however most of the local roads are really narrow.
Taking in account confused feeling of gabarites it was really breathtaking experience for first couple of days.
Another interesting detail is a speed limit on the roads. Most of the roads outside of towns are 70mph.
British don't abuse adding additional limitations. Now imagine,
very narrow curvy road with lot of buses and trucks "flying" towards you with 70mph.
However, after couple of days I got use to this, as well. Britons was really patient despite my "too slow" driving.
One more thing which got me confused are roundabouts.