Alert on swimming and barbecues in Lincolnshire quarry
People having barbecues and swimming at a Lincolnshire quarry are trespassing and putting themselves in danger, police have warned.
Officers said they had received reports that groups had been seen at Langtoft Fen, near Stamford.
They reminded those living nearby that the quarry was private land and its lake was extremely dangerous.
Owner Hanson Aggregates is improving perimeter fencing and police said they would visit the site regularly.