Intressant om det stämmer, måste väl gå att spåra om de styrts med sändare?
"The usual practice (when a drone is spotted) is to suspend flights for half-an-hour, which is the usual battery lifespan for drones," explained Parker,
a former Royal Airforce fighter pilot and head of drone training company Flyby Technology.
But in the case of Gatwick, "whoever is responsible for this has had several batteries and have brought their drones back to the ground to put new batteries on them," he said.
The drones used to disrupt flights at Gatwick are believed to be of an "industrial specification," according to Sussex Police.
This means that a device is not an off-the-shelf consumer drone, but something bigger or more complex, or perhaps expertly home-made, explained Lewis Whyld, CNN's drone operator and photojournalist.
He added that drones can have huge ranges, with some of the more powerful ones controlled from up to 10 miles (16 kilometers) away.
Drones don't necessarily need an operator, added Whyld. They could be pre-programmed to follow a route using GPS, he said.
London's Gatwick Airport shut for over 17 hours in unprecedented drone attack - CNN