He described seeing a triangle-shaped aerial vehicle, which was "a grey, dark colour", in one of two evening sightings of drones he had made in the past week. "They were really noisy and had lights. They looked official to be honest," he added.

A number of unidentified drones have been spotted over three United States Air Force bases in England over the last six days, U.S. officials said on Tuesday. "Small unmanned aerial systems were spotted in the vicinity of and over RAF Lakenheath,

The Air Force didn’t identify who was behind the incursions, but said officials determined there was no impact on residents or critical infrastructure.

Small, unmanned craft were seen flying over four bases in England, the U.S. Air Force in Europe said. The Pentagon said that there had not been “any significant mission impact.”

Drones have been spotted near three military bases in Britain but they have not been identified as hostile, the US air force (USAF) says. In a statement on Tuesday, the air force said the sightings occurred on Monday and overnight.

The U.K. sent military personnel to help jam and track the drones after sightings.

Sixty RAF personnel have been deployed to assist the US Air Force (USAF) in its investigation. It has also emerged a fourth US airbase has been targeted. "Protection of our personnel and bases is of course our highest priority,