Mike, this was the Regular Forces 106mm Anti -Tank course in Canada.  It was replace by the T.O.W system and the Reseves had it for a number of years after.
Front Row:  M/Cpl Williams, Sgt Anderson (Crse WO), Lt Halpenney, M/Cpl Wier, Cpl Wall

2nd Row: Pte Carvalle, Pte Nugent, Pte Frame, ?, Pte Surduke?, Pte Thompson, Pte Filmore, Pte Hartland

3rd Row: ?, Pte Shanahan, Pte Thomson, Pte Lyver