The airport had been closed for 33 hours. More than 1,000 flights had been cancelled, and more than 140,000 passengers affected. “It showed the serious risk of drone intrusion, and how quickly that could bring an airport to its knees,” said John Strickland, an aviation consultant. In total, 170 drone sightings were reported, 115 of which were later deemed “credible” by police. But neither Mitchell, nor any of the news crews camped out for two days, had managed to get a photo or video. Neither had any of the thousands of passengers and airport staff on site; no one who reported a sighting had captured an image on their phone. [...]
Military drones such as the Reaper or the Predator are capable of flying hundreds of kilometres and staying in the air for more than 24 hours at a stretch. But most drones do not have anything approaching this capability: they vary in size, but most are, even with their arms extended, no bigger than a laptop. They struggle to fly in wind or rain, and have limited battery life. Top-tier consumer drones can travel for up to five miles, but have a maximum flight time of about 30 minutes. Custom-built drones might manage up to a couple of hours, but not much more: larger batteries add weight, which uses up more battery. “If someone were flying drones for hours, they’d need a carload of batteries,” Ryan told me. [...]
When Hudson first heard about Gatwick, “I thought this was some absolute idiot and I wanted them caught.” But then he realised “the basic facts don’t add up”. Sussex police had mentioned lights in the corroborated sightings. But if someone had planned the attack, to the extent that they had procured scores of batteries and hacked the drone’s in-built geofencing software – which uses GPS to stop drones from flying into restricted zones such as airports or prisons – then why would they leave the lights on? “You’d disable them,” said Hudson. [...]
Hudson looked at publicly available information: photographs taken during the incident, and statements by Sussex police. Since then, he has identified inconsistencies that he believes undermine the claim that there were drones at Gatwick. Soon after we first spoke, Hudson sent me a long email, including a timeline of tweets and photographs posted during the incident, highlighting contradictions. (“Did he send you four A4 pages with closely typed text and diagrams?” another drone-flyer joked. “It’s one of Ian’s pet subjects.”) The photos he included showed military counter-drone systems being set up on 20 December, the second day of the shutdown – and tweets by Sussex police mentioning sightings after this point, right into the early hours of 21 December. This included one cluster by “credible” witnesses – airport staff and police officers.
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