Decided to pick this up again, but still hitting a bit of a brick wall with William Stanley (preventing me going back even further).
Last confidence I have is Matthew Stanley - 1837-1886 (Butcher) married to Emma Rainbow.
From various sources I can see that Matthew's father is William Stanley, and mother is Mary Gardener/Gardner.
My understanding is that William was a Victualier/Publican of the Swanswell Tavern (TBC).
I believe he married Mary in 1815, but struggling to get 100% confirmation on his age etc.
Looks like there are two William Stanley's from the same area, one who died in 1847 aged 41, and one who died in 1848 aged 55.
Struggling to find both on the 1841 census to help rule one out (as I'd expect to see William, Mary and Matthew listed together).
I believe William may have been born in Middlesex (again TBC), but until I can confidently find the right William I'm reluctant to try and go back further for fear of going down the wrong path.
Any additional help would be hugely appreciated.