Frank August
Frank, In NSW Ausralia potable water storage tanks shall be cleaned and disinfected evey two years. The tanks should have lids to keep vermin, dust etc out of the water. There are proceedures to clean and disinfect the tank which are too indepth to list here. Maybe the same info can be gained from the water authorities codes in London. My wife and I are flying to London to visit our son for a month. Maybe we will not drink the water. Just go to the nearest pub and drink beer or scotch with soda. Mossy
