Another update today, presumably prompted by yesterday's
regulation update from the CAA (
discussion thread).
Latest is basically that they now feel that it was an inside job, possibly by a disgruntled employee, because they believe the pilot knew the airport well enough to dodge between buildings to avoid detection. (Not that all that information couldn't be obtained by doing your homework on Google Maps satellite view, mind).
Other bits: Police claim they *do* have footage of the drone(s), but it's of too poor quality to be definitive and they've decided not to release it, although some of the articles do include previous alleged footage. There's also a ban on phones in the control tower, which is why there is no clear footage of the alleged incident where the drone hovered right next to the tower. All this is supposedly backed up by the previously reported 130+ sightings of the drone, with the additional clarification that 109 of these were made by credible witnesses such as airport staff and police.
Various media coverage, each with slightly different details/quotes, etc:
Daily Mail
Evening Standard
The Sun
The Times (registration required)