Hi Again Emma.
I have just been digging through my Mothers papers and found that she did have acopy of John Lee & Elizabeth Evans Marriage certificate.
but they dont seem to match what you found on the free site.
I have a date of 3rd November 1906, page number 189.
they is another number just under the year date at the very
top and that say's No. 378.

I also have witness names on the cert...
W Evans, and Esther Evans.

John Lee's fathers name on the certificate is Edward Lee. (36 Elver road/Elva road)

Elizabeth's fathers name is John Evans (20 Mayfield road.)

in the parish of Victoria Docks in the county of West Ham.

Emma if you think of anything I would love to hear from you.

Best wishes
John.