You want to follow the info people post more closely!
(edit - not you, suz.
I was in the previous thread so once I found it, I remembered it well.)
The birth registration info has been posted (in your previous thread) -- MAGGIE MAY JAMES 1895 Brixton.
It would be the other way around: either she thought Maggie was a nickname so married as Margaret, or she thought Maggie was too "common" so married as Margaret.
(That was very common around that time: my grandmother was Lily but my grandfather insisted she call herself Lilian. I once found someone's grandmother who married as Kathleen Marion being born as plain Kate Mary. Young women of the day seem to have "upped" their names quite often.)
You have Ancestry access -- just look at Alfred Henry Warley and Maggie May James in 1911.
(This wasn't a request for 1911 info and 03mainj does have a personal sub to use to find this info, so I don't see a problem with mentioning it.)
They are living mere doors away from each other in Brixton.
They are both in district no. 275; she is in household 30 and he is in household 57.
There can't be much question but that they are the people who married in 1912.
To find your earlier posts, just go to your profile, btw. Or do a simple search of the site for the names, for instance. It really does help other members to have the info that others previously worked to find, and not do it over again!