I also wonder if anyone has put 2 and 2 together and ascertained whether the water loss is attributable to the arrangement at Forest Hill whereby overspill into the scum channels (the slots you find around the edge of pools) goes directly into the drains rather than being recirculated. I understand this is unusual and would mean that the pool loses much more water than normal.

Could be a red herring but in the face of a tide of ******* ******** these things need looking into.