You might like to look at Youtube 'From Holloway to the Western Desert-mpeg2video.mpg'.
It's a succession of stills from 64th Medium Regiment RA, fully captioned as to personnel. Photographs of the 6" howitzer they were equipped with until 1943. Accompanied by stirring martial music guaranteed to raise your spirits. Fine looking young men, no obesity there. Photo's of AEC tractor, a Matilda and Crusader III, latter just might have been a regimental artillery observation tank, don't promise though.
Probably in mid 1943 re-equipped with either the 4.5" or 5.5" medium gun.
At Arnhem September 1944. Major General Urquart, OC 1st Airborne Division rewarded 64th with Pegasus badge worn on lower left sleeve and retitled 64th as 64th Airborne Medium Regt. RA for it's fire support at Arnhem which saved 1st Airborne from being totally destroyed as against merely destroyed, it was not reformed. Of course, Urquart had no authority, and wearing of the airborne badge and change in title were cancelled.