The bunker is situated next to a water reservoir in Donnington in the Cotswolds.
It is similar to the Blunsdon Thames Water Bunker in Swindon that has now been demolished and Reading’s Thames Water Bunker.
There were three divisions of Thames Water - West, Central, East, each division would have protected communication centres however the western division was done first but the Cold War ended before the other areas were completed.
Therefore there was no central HQ bunker, all the bunkers would have been autonomous this includes Reading, Blunsdon (Swindon) and Latton in Wiltshire which is also the site of their peacetime control centre.
These bunkers were just communication centres to manage engineers and recovery; they were not telemetric control centres for water supply. All these types of bunkers were built between 1990-1991.