Thanks so much jonw65 for taking a keen interest and helping me to work through possibilities.
I will post here what the marriage cert states regarding the address of Alice MM Crook to see if it matches that of 'Annie' Crook at 7 Lanark Villas in the 1911 census.
The other people are intriguing on this census. Why were 'Annie' Crook (presumably Maud), and Jack/John Campbell in that particular household, with Annie of no occupation? What was she living on? I notice that Alfred Lawler was a gentleman living on own means, and single. Now I'm wondering if knew Annie Campbell and perhaps Jack/John's father, in fact, and had a lapse of memory, putting down Annie instead of Maud? Or perhaps I'm adding 2+2 and getting 100! Jack/John's older brother, Alfred born 1896, put on his marriage cert that his father was a gentleman, although that could have been pure fiction. I have been on the lookout for candidates for the father with the first name of Alfred, since often the firstborn child takes the name of the parent.
Looking at Rossetta Lawler in the 1901 census, she and her brother are in the High St, Lewisham running a school, with 5 Spanish teenagers, 1 French and a few British pupils. In 1891 she was a lodger in a household but her occupation was 'governess school'. In 1891 Alfred Lawler was a tutor at Blackheath Commercial School for Boys in Lewisham.
On looking up Alfred Lawler in the newspaper archive, he pops up as a principal of the above school, but also in the divorce proceedings reported in Manchester Courier and Lancashire General Advertiser 25 April 1914 for a relationship with Admiral Prothero's wife. So that explains Nellie Prothero, visitor to the Lawler household in 1911....
