Now common, Mike K: this is really a shot from your family album and that's you in the foreground, right!!??
The 15 cwt is interesting as it has the early pattern steel base body without the storage valises within the rear wheel arches .....
As to the Ford 'Defect', nice little car. More than a few of the first model were used as staff cars in Australia during WW2, mainly as 'local area' runabouts by contract liaison officers. Also supplied to US Army in Australia: can you imagine a US Army officer, used to tooling about the USA in his V8 Ford sedan, being handed the keys to a Ford Prefect with fresh white US service stars on the doors, and being told 'these are your new wheels, and by the way, the steering wheel's on the 'wrong' side'??!! The reaction may have been priceless!
Mike C