This is the XM and the original brochure came from a company called Group Designs in the early 1970’s, and were based at & Balena Close, Creekmore Industrial Estate, Poole in Dorset.
It then appears to have been taken over by Nomad Sales, 53 Mapel Way, Burnham on Crouch, Essex, in 1977 and then re-named the Griffin and then also offered with a VW Beetle chassis as well as the Morris Commercial one, the article from Nomad suggests that a few were produced by Group Designs by its not known if any from either company actually exsist, if you do have any information or details of one please let me know.