Hi Tazzie,
Yes I think you are right. I have had some info from the Bucks family history society which hopefully pulls all this together. I believe that the data on 1851 is Johns family and hopefully will be able to go back even further (with help from others).
Thanks for your input any other info would be gratefully accepted, I do not have access to 1841 or 51 census.
Regards
Andy.