Hi Ian,
From the information you have, you could find the GRO references for Ellen's birth and marriage using FreeBMD and order the relevant certificates. The birth certificate should give you at least her full name and her mother's name. Either certificate might have some information about the father.
Have you thought about the possibility of children? For example the following births in London have Tyers for the mother's maiden name: Jack WA Wilkinson Dec 1942, Hammersmith, vol.1a, page 349 and Brian RE Wilkinson Mar 1947, Hammersmith, vol.5c, page 1546. There is also a Tyers birth in London in 1938 that could be an illegitimate child.
Hope this helps.
Paul