In the background

[Bruce Parker (RIP)]

Given the rubber tail light on the carrier (early), the 11 cab (I think) CMP FAT with 'Canadian' style markings on the door plus the denim battledress on the jeep(ish) driver, I bet Canada, around 1941. Then there's always the licence plate that says Ontario, 1941. I bet Petawawa or Borden. It's not certain, but the face of the 11 set in the ban-jeep-tam looks light. Canadian sets were green-faced, British ones black.