Thank you Wally for the swift response and information. This is most helpful!
Looking at the list of serial numbers, I would interpret it as making '182' a serial number allocated to the second /intermediate Army Group Royal Artillery (AGRA) of either the British 2nd Army or the Canadian 1st Army. I am convinced that this vehicle belonged to the British 2nd Army, as the formation sign is that of the 2nd Army, rather than that of the Canadian 1st Army. Also, one of the men riding in it is wearing 2nd Army formation patches (rather than those of the Canadian 1st Army).
As I understand it, at Normandy, the 2nd Army included I Corps, VIII Corps, XII Corps and XXX Corps; with the AGRAs usually attached to these corps' being 4th AGRA, 8th AGRA, 3rd AGRA and 5th AGRA respectively. Although, by August 1944 I Corps moved to 1st Canadian Army. I would then understand the second AGRA in the British 2nd Army as being either 8th AGRA attached to VIII Corps, or 3rd AGRA attached to XII Corps. The question would then be which of these AGRAs?
The only other clue that I can see are the letters "RC" in front of the driver.
2nd Army T crop02.tiff