Standege Tunnel, Diggle Portal. 1960 or 1961?
The trip was for adults and was (probably) organised by BWB. The pipes are the propulsion for the boat; there was a diesel pump on board which pumped water out of the back of the boat, it was reversed for the return journey. The intake was presumably at the other end. Grid Ref: SE 0060 0793 [HN-018-840]
ROMA ID: 101509E