Not a WW2 vehicle. Humber Pig in "flying pig" configuration with fold out side barriers for riot control used in Operation Banner in Northern Ireland. The weaponry on the roof is not authentic!
billh35 You may notice on this album - BMPs, ATLBs, Chieftains, Antars, Moto Guzzis, Fox, Ferret & Gipsy. Beltring was a Vehicle show, rather than a WW2 vehicle show. Think this Pig had the 'Confidential report' phone number on the other side, but there were always a few present, flying & otherwise, in roughly their most well known plumage. Matador Bus you might like here, from the same location: Postwar Civil & Civilian use of WW2 Vehicles. seem to recall it plied its trade around the North York Moors for a while.