I give way to windriver.
However, according A J Jackson's British Civil Aircraft Volume I the aircraft is listed as a B.A.C Drone. also a document published by the British Aviation Preservation Council entitled "Aero-Engine Exhibited & Stored in the UK and Ireland" Issue 1 dated 1st May 2003 listing the engine records the following details:- CARDEN FORD, Model C - 1934, 28hp, 1.2lt, 4L, w, 130lb, Unknown marks;Brooklands Museum: BAC Drone G-AEKV.
Great challenge Tiger_mate