Hi Derek,
I presume the' colleague from up the Tyne & Wear way' is that well known reprobate Bryan Young? - I've known him for about 25 years!
Regretfully, the only photos of the boiler I can find in the unclad state are the two that appear in the main tale of Natterer - never thought I'd be telling her story.
However, if there's any specific info you need, then let me know, and I'll do my best to answer (for example, I have all the measurements I took when I bought it, together with all my calculations for strength, working pressure, etc
Regards
Ted