Can I see a faint RAAF on the door and bumper , or is it RAF ? Could be a truck in use with 451 squadron RAAF which used the squadron code 'BQ' they served in the Middle East and Europe
https://en.wikipedia.org/wiki/No._451_Squadron_RAAF
The unusual body was probably retrofitted from another vehicle , could even be a body from a captured vehicle fitted somewhere in the M.E. Or, maybe the body was custom built by a workshop , to fit that particular chassis, the wheel box cutout does line up accurately with the rear axle.