British Police Say It's A 'Possibility' Gatwick Drones Never Existed

British police said the drones which caused three days of chaos at Gatwick Airport may not even exist.

It comes as two people arrested over the disruption were released without charge.

Police do not have footage of the drones, and are relying on eyewitness accounts and the discovery of a damaged device.

When asked about the possibility that the drones didn't exist, Detective Chief Superintendent Jason Tingley told the BBC:

"Of course, that’s a possibility. We are working with human beings saying they have seen something.

“Until we’ve got more clarity around what they’ve said, the detail -- the time, place, direction of travel, all those types of things -- and that’s a big task.”

About 1,000 flights were diverted or cancelled between Wednesday and Friday, affecting more than 140,000 travellers.

Thousands were left stranded as their flights were redirected or cancelled. Photo: AAP.

READ MORE: Gatwick Airport Reopens After Drone Chaos

Sussex Police arrested a 47-year-old man and a 54-year-old woman from the local area late on Friday, but both people have now been released without charge.

"Both people have fully co-operated with our inquiries, and I am satisfied that they are no longer suspects in the drone incidents at Gatwick," Tingley said on Sunday.

Police said they were actively following lines of investigation to catch those responsible for the most disruptive incursions from unmanned aerial vehicles seen at any major airport.

Drones were spotted at Britain's second-largest airport on Wednesday evening, forcing it to close its runway in the run up to Christmas. Every time the airport sought to reopen the runway on Thursday, the drones returned.

Authorities finally regained control over the airfield after the army deployed unidentified military technology to guard the area, reassuring the airport that it was safe enough to fly.

The drones caused misery for travellers, with many sleeping on the airport floor as they searched for alternative routes to holidays and Christmas family gatherings.

Airlines operating at Gatwick, which is located south of London, include easyJet, British Airways and Norwegian.

With AAP.