Badge definitely portrays a
Beaver-Eel
Beaver-Eel
"The Leyland Beaver-Eel, known officially as the Tender, Armoured, Leyland Type C, was an armoured truck used by the Royal Air Force throughout World War II for airfield defence duties."
The Home Guard also used the
Beaverette.
Beaverette
"The Beaverette was extensively used by the Home Guard (United Kingdom), British Army and RAF Regiment for home defence service and training. "