reading the series a review in MPH by Bob Stafford F E Tapp ( Edwin)was at the factory late 1940s working on the life boat engine project, I think he worked for the M O D as a inspector on this project when he was there he built a speedway engine in to a series a frame I had this bike at the series a rally 2006, Edwin must have sold this bike to Gus GUY as it was in his care for many years it is now in the Ian Boyd collection in Austraila