i believe Sweden drove on the left same as us, then someone decided to change to the right the same as the rest of mainland Europe. They changed all the signs etc. so one morning everything changed to the other side !! imagine waking up to that...bet the body repair shops were busy...
Japan drives on the left , hence so many jap imports,
(also Cyprus & Possibly Malta) apart from Japan notice a patern forming here...all GB commonwealth countries...