Hi my 1940 m20 was sold off at Ruddington to Dawsons in 1964 i have the log book with Dawsons in it Reg being BTO ***B i am the second owner having bought it in 1968 still in use and enjoying it.
Thanks Rob, the number immediately before mine is listed on DVLA as a red Royal Enfield and the number two before mine is a red BSA 649cc. Three before mine is another Royal Enfield . It seems highly likely that the lot were registered by Dawsons as I am 99% sure was mine. It would be great to find some of these other bikes though just to confirm what I already know.