Hi gh03
This must be a really hard time for your Mum & self, but don't give up.
We always knew we had a baby Sister who died at birth but that was all we knew, as children you don't think of these things but Mum always remembered baby Winifred Ann as my parents named her.
A couple of months ago Mum & I were sorting through old papers and we came across the burial certificate for our baby born in 1948, Mum & Dad paid 12 shillings & 6 pence for her funeral, I then applied for the "Stillborn" birth certificate on behalf of Mum, then contacted the Heaton cemetery in Bolton, luckily the burial record had the plot number on it.
The people at Heaton were great, and though baby Winifred is buried in a common grave at least we now know where she is.
Mum will be 91 in a few weeks time and this has been very emotional for her but also a healing time for the 7th child she had, the only one she lost.
Keep going in your search.
Trish