Photo from Library and Archives Canada, showing a Churchill tank, and the interesting markings on front left, I believe is probably the names of the crew, BUTCH, LOUIE, HANK, PUG, SLATS, WILIE Date: Approx 6 Aug 1944
AoS looks like 1233 (5 Aslt Regt RE), but this AVRE probably did not participate in D Day, because it shows none of the various impedimenta carried by D Day AVsRE. Therefore most likely a replacement or LOB tank. The six nicknames must be those of the crew.