Hi Fiona,
We might have some common ancestors and it looks like you are ahead of me in the research.
I am researching Jane Potter, my great, great, great grandmother, who was born The Bog, Wentnor (near Shelve) 1837 ish (going by census dates). She married James Bright and lived in Clun.
There were two Jane Potters at The Bog, one to Thomas and Mary (your ancestors) this is the most likely one to be my ancestor, going by age. But also one to Richard and Ann who was a couple of years older.
I went to visit The Bog, don't know if you know the area, The Bog was an old lead mining village in the Stipperstone Hills. It's in the parish of Wentnor, but quite some distance from Wentnor, however, it's much closer to Shelve, so as I'm sure you've found out, the children were christened in Shelve. They will have lived in old miners cottages, these are all demolished now, as is the mine but there is a visitors centre and tea rooms which has some old photos of the mine and cottages.
So your link to a Francis Woodfield in Shelve is a strong possibility.
You might be able to help me. You seem to have found details for the marriage of Thomas and Mary Potter, can you send me details? Also Mary's death, I had guess 1850 as this was when son Thomas was born but father Thomas was recorded as a widow in 1851. Maybe she died in childbirth?
The big mystery for me is to prove which Jane Potter is my ancestor, if you have any evidence to support the Jane Potter from The Bog (Wentnor) that married James Bright is the one born to Thomas and Mary rather than to Richard and Ann that would be amazing.
Thanks,
Andy