The vehicles I can find listed as tanker/refueling for the RAF UK/Europe are
Albion A.M. 463 4 x 2, 350-gal Petrol Tanker
AEC. 854 & 0854, 6 x 6, 2,500-gal Petrol Tanker (used by RAF & USA-AC)
Bedford QL, 4 x 4, 950 & 1,000-gal Petrol Tanker
Fordson WOT1, 6 x 4 1,000-gal Petrol Tanker
Plus a number of Tractor towable Trailer Oil/Petrol Tanker units:-
CMP Chevrolet vehicles listed as Tanker on the Chilwell list are in Census number range
L-5590405 – 5590504 Contract SM-2582
L-5809000 – 5809029 Contract SM-6122
L-5833357 - 5833456 Contract SM-2582
L-6233265 - 6233267 Contract SM-6060