Flights have been suspended at Gatwick airport following sightings of drones being flown close to the airfield.
The problems began at about 21:00 GMT on Wednesday and the runway was closed all night, grounding outbound flights and forcing inbound planes to be diverted.
Dozens of passengers tweeted their frustration at being stuck on the tarmac for up to six hours amid the chaos.
Thousands of people are thought to have been affected so far and that number is likely grow significantly as the day goes on.
Gatwick apologised for the disruption but said safety was paramount.
It is illegal to fly a drone within 1km of an airport – and doing so can carry a prison sentence of up to five years. -BBC
