Yes, Rediffusion's parent business [BET - British Electric Traction - who also made/operated trams!] owned a company which made flight-simulators and a whole range of aviation/land-mobile-radio gear sold under the "Redifon" brand-name.
https://www.gracesguide.co.uk/Redifon
I've got an ex-military Redifon HF antenna-tuner here.