Well the good lady's gone and done it again, she's looking at stuff on Facebook using her I phone and says I like this and shows me a picture of a Matchless. Instant double take, "Lordy that is nice!" says I, and took the phone for a better look.
Turns out to be a Matchless G80RR, a factory built flat tracker from (I think) 1957, never heard of it! and after Googling it up, neither have many other people, information is very limited. There may have been 20 built or possibly 50, but what a thing of beauty it is.
This bike was restored by Yoshi and the boys at The Garage Company and seems to have a lot of what are probably correct factory parts still on it.
If anybody knows anything about these rare beasts I'd love to hear about it.