[spuz]

You are not the only one questioning the existence of the drones: https://www.telegraph.co.uk/news/2018/12/23/police-admit-may...

[dmix]

That article is paywalled but what about this bit of the parent article?

> "We are [..] carrying out a forensic examination of a damaged drone found near the perimeter of the airport.

Sounds like some evidence of at least one drone. But regardless this is still likely a culmination of panic over a potentially one-off sighting.