Between 1962 and 1992 there was a hardened nuclear bunker, built at Borras for No 17 Group Royal Observer Corps North Wales, who provided the field force in Western Area of the United Kingdom Warning and Monitoring Organisation and would have sounded the four-minute warning alarm in the event of nuclear war and warned the population of Wrexham in the event of approaching radioactive fallout. The building was staffed by up to 120 volunteers who trained on a weekly basis and wore a Royal Air Force style uniform.
Between 1962 and 1992, there was a hardened nuclear bunker at Borras for No. 17 Group of the Royal Observer Corps in North Wales. This unit was part of the United Kingdom's Warning and Monitoring Organisation's Western Area and was tasked with sounding a four-minute warning alarm during a nuclear conflict and alerting Wrexham residents when radioactive fallout was imminent. The building was manned by up to 120 volunteers who trained weekly and wore a Royal Air Force-style uniform.