I am no expert, but just as an idea I would look into 80 wing, as based on sources that was responsible for many of the "dummy airfields" (Starfish sites):
"The Royal Air Force’s 80 Wing supervised 27 sites and employed 2,000 personnel on STARFISH operations."
source:
http://airwargreatbritain.********.c...rfish.html?m=0
Regarding list of Starfish sites and units responsible for those:
Arborfield Local History Society - WWII Starfish Decoy Sites
Apparently the 80 wing was established for electronic countermeasures:
"On June 1940, a RAF Radio Counter-Measures (RCM) unit was formed at a requisitioned country hotel, Aldenham Lodge, in Radlett, Hertfordshire, to provide electronic countermeasures (ECM) and intelligence on enemy radio/radar systems.
On 7 October, it was renamed 80 (Signals) Wing, with the motto "Confusion to Our Enemies". 80 Wing worked under the immediate control of the Air Ministry, but kept in close touch with RAF Fighter Command's operations room at RAF Bentley Priory."
Source:
https://en.wikipedia.org/wiki/No._80_Wing_RAF
Combining this to lauriebe's infromation it would make sense that your uncle was involved and that would narrow down the search.