Wow.
I'd love to be a fly on the wall when management and designers were talking over new models and future directions. We think of 2-stroke lightweights as being pretty utilitarian, but there were obviously people in the companies who had aspirations to build a better mousetrap. I have to admit I don't know (or didn't know!) much about Normans, but I'll think better of their efforts from now on.
I recently researched Tilbrook in South Australia, and like some of the more interesting UK brands (DOT, DMW, Greeves...) it was a good reminder that there were some very interesting Villiers-engined bikes built in the 1950s.
Re the swing-arm Roamer in the photo above, I'd say 33d6 is spot on with 1954 (see attached). In 1951 and 1952 Super Elliott seem to have sold autocycles and Villiers engined "Super Elliotts", but I could find no photo or survivor... I assume they were just re-branded Norman/Roamer/Rambler. Yell if you've seen one!
Cheers
Leon