Got a group to a REME gent who spend most of the War attached to 5th Northamptons, 78th Div (although he was 16/5th Lancers by 1947) - it includes the attached photos, it's not something that jumps out as familiar to me, seems a narrow vehicle but wide tracks - the collars and ribbons make me think the photos are from the 45-47 period
Canadian Bombardier B3 snowmobile. Museum of Tanks and Armored Vehicles in Patriot Park Stock Photo - Alamy Bombardier snowmobiles (was: Identification quizz 2) - MLU FORUM