Hello Dave
There are 2
submitted entries on the familysearch.org site for a Thomas JACKSON:
- Thomas Jackson born 21 Oct 1810, bpt 25 Dec 1812 parents John Jackson & Elizabeth White Jackson
- Thomas Jackson bpt 24 Sep 1812 parents Thomas Jackson & Frances Martin Jackson
Unfortunately the entries do not state which parish church these events took place but using the free search engine on FindMyPast there are these corresponding entries:
- John Jackson married 1803 Bury St Eds St Mary
- Elizabeth White married 1803 BSE St Mary
- Thomas Jackson married 1805 BSE ST Marys
- Frances Martin married 1805 BSE St Marys
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Familysearch lists the children born to Thomas & Frances, BSE & they inc a Frances & a Mary Ann. Your Thomas & Matilda went on to name 2 of their children Frances & Mary Ann, which might be an indication of who his parents were.
As for their marriage have you considered that as their first child William Thomas c1836 (1851C) was born in Maidenhead it is feasible that they may have met & married there?
Good luck
Keziah