Hello Peter,
Thank you for your response and the information. I have only very recently started to look at the "offshoots" from my maiden name of Knights, so not been on the trail of the Cornwells for very long.
Back in 2002 a gentleman from Bedford had contacted me regarding my Howard ancestors and had stated there was a "family legend" that we were related to Jack Cornwell - from this thread, I find this is true - distantly

My 12 year old will be pleased as he is very interested in the war and has often asked if I can find a VC anywhere on the tree!

Do you use Ancestry? I do have a tree on there although no current subscription. I am happy to share the tree with you if you would like.
I had traced Hannah through the years via the census and noted the pub! I did not know about the subsequent marriage, so will dig into this a little more, thank you so much for the information. Have you gone back any further with James parents?
I shall probably take a trip over Bottisham way next year. I grew up in Fenstanton (are you a Cambs person?) so I know Bottisham a little but not very well.
Thank you again for your help
Karen