The ancestry lady has come back to me and said that she thinks the Sheila Watson in her tree's Mother was Cinnamon and not Page... and she has no idea if hers came from Eastbourne or not?!
Looking at her tree, she doesn't seem to know much about him, I would think that she is related to Florence and just added him as her husband.
Yes ... just because someone else has been there before you, and has posted an online tree, and tells you that "their" Bertram isn't "your" Bertram ... that doesn't mean they are right.
And just because they tell you the name of "their" Bertram's father, THAT doesn't mean they are right, either.
An example of this is a great uncle of mine, who was gay, and moved to America in the 1950s where there was more acceptance and toleration of homosexuality than there was here in England at the time. He never married, and never had children. He died in 2002 and my great aunt, who is still living (the only one of my grandfather's siblings who is) flew to America and scattered his ashes on the Potomac river.
The source of my information is unimpeachable. But somebody else has my great uncle (and my other ancestors in this line ... not particularly well researched and with many errors) in their online tree claiming that he married one of their ancestors and had children. I have e-mailed giving them my information and letting them know that they're following the wrong line. But they have ignored me and their tree still shows my ancestors as theirs.
Now, if I hadn't known everything I do from my great aunt, his sister, I might have approached them saying that I thought we had a relative in common, and when I told them that my great uncle had been gay they'd have said "then he isn't my great grandfather" ... which would be true; but that wouldn't mean that MY great uncle wasn't the man THEY were WRONGLY showing on their online tree as their great grandfather.
So ... if your research convinces you that the man shown in their tree IS your man, then go with that conviction. And if your research suggests a different lineage than that which is shown in their online tree ... go with your research.
Not everyone who posts online has done better research than you ...