Sunbathers on the famous Studland nudist beach in Dorset believed they've been spied on by a drone with a camera attached.
The drone is reported to have flown up and down the beach. A spokesman for the naturists said that several people had complained.
People sunbathing on the beach are worried about the use of any pictures. Anyone flying a drone over National Trust land would have to obtain permission - it's understood that no permission was sought.