Harry Ferguson Tractor Research, Toll Bar End

Hello everybody, I would like your help. I'm currently writing about some prototype tractors that were built by Harry Fergusons' Tractor Research Division between 1961 and 1965. They were called Mk1's and had a 948cc BMC diesel engine. The design went on to be the BMC Mini 9/16 tractor. I have been searching for these prototypes and have found 8 so far with another 7 to go. I currently own two of these, registered 496EUE and EAC943C. Can anyone who worked at TR or knows about these prototypes and would like to talk about them or who has pictures, records etc to aid my story about them please contact me on 01453 547577 or 07941 890062. Many thanks. John Poulter.