If I could nail down this marriage ... it would make me more confident ... it can be tough and tiring when you hit brick walls
I am at a loss to understand the difficulty here. This is not a brickwall. You simply need to order the marriage certificate from the General Register Office, as has been advised several times above. This is the normal way to proceed to establish the father's name with any confidence.
https://www.gro.gov.uk/gro/content/certificates/app_select.aspAs I understand it, this is your direct line, not a side-shoot. Civil registration certificates are the backbone of genealogy research in the 19th century - they are not 'optional extras'. Nine times out of ten they will give you the confidence to proceed backwards another generation. Speculation, and reliance on other people's online family trees, will not do that, and such mistakes can be costly in both time and money.
If perhaps you have never ordered a marriage certificate before and need help doing so, please ask on this thread.