For being a false flag I'd not be surprised.
   Still, few outside of military radio development know gov'ts now
   routinely use UWB underlays for numerous purposes, including cognitive
   radio. AFAIK, there's no regulatory prohibition against UWB in the ISM
   bands, so development and testing could easily proceed OTA. Once
   tested, changing the bands could be straightforward.
   I am using the term "UWB" broadly and not the more restrictive
   regulatory definition. If the drones are not configured to use HD video
   the required bandwidth is miniscule and the process gain (PG)
   substantial compared with the baseband data rates.  Very high PG makes
   signal detection and jamming more difficult.
   Probably also coming soon, very high PGs wherein the codes, bandwidth
   and frequencies quickly hop according to a shared secret between the
   drone and its controller. This combination is being explored for
   possible Next Generation military comms.

   On Sat, Dec 22, 2018, 1:20 AM jim bell <[1]jdb10987@yahoo.com wrote:

   On Friday, December 21, 2018, 12:23:44 PM PST, Steven Schear
   <[2]schear.steve@gmail.com> wrote:
   >One has to wonder if the Gatwik dronners simply found a way to modify
   the wifi frequency placing it out of the ISM band and the military's
   radio countermeasures were specifically only for those frequencies.
   That sounds relatively simple.  One problem might be that on a spectrum
   analyzer, a set of WiFi-looking signals, a few tens of MHz from where
   WiFi ought to be, would stick out like a sore thumb.
   The large majority of airport-visiting people have cell phones, and
   many of them will be accessing WiFi at any given time.  It seems to me
   that anybody attempting to control a drone secretly might want to "hide
   in plain sight", using an existing WiFi system.
               Jim Bell

References

   1. mailto:jdb10987@yahoo.com
   2. mailto:schear.steve@gmail.com