Most likely marriage I can find at present is
Jul/Aug/Sep 1889, Liverpool reg district,
John Sergeson
Also on page is a Jane Thomas (no middle name)
(i did find this one whilst looking on your other thread, but discounted it, as you had her name there as Ellen!)
But at this stage it is ONLY A POSSIBILITY.
As Peterbennet and Pauline say, the next step is to get Ellen's birth cert to establish her mother's maiden name.