SECURITY has been increased at Burrator Reservoir after a report that the dam had been used by abseilers.

The patrols have been stepped up following the warning that those abseilers had not only put their own lives at risk, but the lives of others as they had stretched a rope across the road over the dam.

South West Water and South West Lakes Trust are appealing for visitors to reservoirs and lakes in the region to keep themselves safe.

A spokesperson from South West Water said: 'We work closely with South West Lakes Trust to make our reservoirs accessible and pleasant for people to visit.

'However, we would remind visitors that these are operational sites with hidden dangers.

'Every summer, we remind people not to swim in our reservoirs because there are no lifeguarding facilities, they are very deep — often with steep sides — and can be extremely cold.

'Similarly, dams are tall, steep structures and in some cases access to the bottom in an emergency would be challenging.

'Reports of abseiling and even tomb stoning at our reservoirs are extremely worrying and we would urge anyone who sees this sort of activity taking place to contact our 24-hour helpline.'

To contact the helpline call 0844 346 2020.