So today I have received the birth certificate as I requested for William Aston. At first sight I thought 'Oh no more disappointment' but I don't know, it might be 'the one'. See what folks think on this very knowledgeable site.
It does give a father's name, which is William Aston - so far so good! The mother's name given is Jemima Standfield. Now does that mean they were not married ? Although I have his mother as Emma, I suppose Jemima could easily be shortened to Emma.
I am not deciding one way or other at the moment, it needs further exploration, if that is possible to get to the answer.
The pdf was too big to send (and I don't know how to make it smaller) so I have 'cut' the main section and pasted it into Word document. Hope it gives you what you need to help.