Hi Sue, thanks for getting back to me. I have had a bit of a game trying to add the documents. This website only seems to accept certain formats with no more than 100KB per document. It wouldn't accept the section of the family tree in diagram form, so I have typed it out (hope it makes sense).
I have attached my sources but have recently come across some info from "Seed of Isaac" (attached), which suggests mine may be wrong.

I do appreciate your time and any information will be gratefully received.

Thanks,