Yes I am saying that you can post a pdf of a birth register entry from 1908 without transgressing any rules either of the forum or the GRO.
and that new info about the column heading 'Baptismal Name if added after Registration of Birth' is the clincher I was hoping for. It was allowed to add a baptismal name within 12 months of registration.
So they registered her as Sarah, went away and for reasons unknown had her baptised as Hannah (or even Sarah Hannah / Hannah Sarah - without the baptism entry I don't know).
Then they toddled off to the Register Office and informed the Registrar, (who no doubt sighed as he'd already sent off the copy register to the GRO) then he did his job, added the baptismal name to the original entry and sent an Occasional Copy A to the GRO to reflect the new info.
Its not a
re-registration, its an
addition of a baptismal name to a registration which has to be sent on to the GRO so they have the most up to date version of the register entry.
and its not just you who has had trouble sorting this kind of thing out, I had similar problems a few years ago and, with a lot of help, got to the bottom of it and learned a bit about how things work :-)
That's how RC works, we have a problem , we get help, we learn something about how things worked and sometimes are able to pass that help along.
https://www.rootschat.com/forum/index.php?topic=815467.msg6767414#msg6767414Boo