Hey Kiwi, that's a neat truck you've got there. In case you are unaware, some "before and after" restoration pics of this truck appear in Wheels and Tracks magazine #15.
What I find interesting with British vehicles is the sheer number of minor design changes they went through (and which of course makes it all the more difficult to find the right bits for an accurate restoration). We have the aero screen models, then yours with a full screen and canvas doors, and then those with solid doors. But even then there are differences - there are some links to Denis' example earlier on, here's another: http://ccmv.fotopic.net/p58114134.html You'll see the petrol tank filler pokes through the cab side, whereas Glynn's radio truck has the filler in the cab (I guess). No doubt there are other differences as well.
(NB Glynn's truck now has the correct Guy Motors badge for the grill.)
Glynn, this string is rapidly turning into an Ant gallery - and nothing wrong with that. Do you have pics of the other survivors?