“I was going onto the garden when I realized the ground was moving underneath me. I grabbed a pole and pulled myself back up onto the patio. “The sinkhole is 20 square meters wide. Emergency crews were called. People were evacuated from seven homes around the sinkhole. Three people were put up on camp beds by the fire service, while others stayed in hotels or with relatives. There were no injuries. “If it had been any nearer the properties we would have seen structural collapse or damage,” Fire station manager Ben Cairns said. The exact cause of the apparition of this sinkhole in not known but sinkholes are relatively common in the area caused by the dissolution of gypsum deposits. Two years ago the British Geological Survey (BGS) said gypsum under the town had dissolved to form a maze-like cave system.