Little Eaton & High Service
Construction of Little Eaton Water Treatment Works
The Sump. Some modification - new or renewed pipework to the centre as can be seen by the concreted trenches in the otherwise stone tank.

RAB: South Sump, looking north, two suctions to old engine houses visible - presumably terminating at the deep pit in the centre, judging by the trenches - a modification, as your caption ? Could well have been pulling air and/or losing prime at low working levels - a perennial problem on the 1957 works South Pump House, until vacuum priming was added.