Either. Ive cycled on the right many times, and do a god few miles cycling on the right, and its never really bothered me.
But, i think if you bring driving on the right in over here, alot of people would get confused, and drive on the left, or go down a road and be on the left etc.
Although it could be amusing when there was the 'switch over'
Cars just going down one side of the road, turn over to the other side, so there will be cars switching sides.
It will be impossible to do over here i say!