Thank you Daniel,
The info is much appreciated.
I will be giving maxitrax a follow up email as unfortunately they have not responded to my last email. Failing that a phone call will be next, but I have got some additional tooling now do I will be able to machine the components needed to complete the work. I don't however like the idea of a cast Firebox and front tubeplate, so these will be made from the usual copper once I have hold of the plans.
I had been sent the catalogue photos previously however it seems that yours are much better quality than the photos sent to me.
The following was some snippets sent to me by Anthony Coulls, the curator at NRM, again from the same book, which explain the loco and it's origins.