I can only find references to the squadron itself (it was involved in the capture of Boulogne and the Channel gun batteries in September 1944) but not of which unit it was a part and thus which AoS number it would have carried. My references show which regiments contained the other squadrons but not this one!
I see one (Capt March, fell off a reserve magazine at Batterie Lindemann) had a turret c/s '3A' but does anyone have an idea on its colours? Seems to be dark (red?) with a white outline.