They had a sunken aisle down one side and the seats were up a little step. The only times I remember going on them were: (probably 1950's) a/ On the very odd occasion from town to Birley Moor Road. They were probably going to Mosborough because they didn't turn down Occupation Lane. b/ In Cornwall. I think these seemed to be "the normal ones" around the Looe area where we often went on holiday.