Jill and Barbara,
Thanks so much for looking into this for me-is quite late in the evening so will look through your replies properly tomorrow.
I understand where you are coming from with the LDS records-there is clearly doubt when a record has not been extracted from a PR.
Have got John and Fanny on the 1841(living in London) and Fanny in the 1851....and actually their birth dates seem much earlier on the 1841....will look at that again.
Have also got the IGI for their daughter Elizabeth's christening and think I did originally try finding the marriage under the corresponding number....
Thanks again-your help is very much appreciated!
(As I said, am having one of those days, so hope to be more on the ball tomorrow!!)
Sarahcat