Thanks Pete, you're a Gentleman.
Thanks as well for the identification. Looking at the printed copy, I think that the number may be Z24845 (I'm pretty sure about the last digit) Presumably this would not alter the contract information ?
The period archives of the UK Motorcycling publications have some wonderful evocative shots in although many of them are obviously posed.
I have another nice shot with a Canadian vehicle in the background taken from Classic Motorcycle. If Pete doesn't mind I will send that on as well (and line him up a beer if he's ever over here in the east of Belgium

)
Rich