underneath the roundabout a network of underpasses and shops was built (with a central area open to the sky), this formed a complex that was officially designated castle square but became affectionately known locally as "ole in t' road" or hole in the road. a feature in the wall of the central area was a fish tank which contained 2000 gallons of water and usually 20 fish including carp, goldfish, bream, rudds and roaches.