http://www.gwim2.pwp.blueyonder.co.uk/ARMAT1.jpg
http://www.gwim2.pwp.blueyonder.co.uk/ARMAT2.jpg
Here's two of the Scottish survivor in Ross's garage at Girvan. Note the thin curved sheetmetal down the roof line, which I assume was to allow canvas to be draped over it and make it look more like an ordianry truck.
Legend has it Jackson at Doncaster has (or had) another which had been used ar an armoured fire engine, and according to Jim Webster there was also one in Bovington or the IWM plus half a dozen in Turkey somewhere in a scrapyard.
Gordon