In 1901:
473/113/4
at 31 Fernlea Rd Streatham
George Wells 1847 b Brighton
Louisa Wells b 1857 Croydon
Edward Johnson Son-In-Law Single Male 17 1884 b Croydon
Lizzie Johnson Daughter-InLaw b 1888 Croydon
Maureen
This does all fit, on the 1919 marriage certificate George Wells is shown as gardener, which is the occupation on the 1901 census. Also 31 Fernlea Road is literally around the corner from where her first husband Christopher Harris was living in Hydethorpe Road, a picture is being built !!
Not quite sure why she would be down as a daughter in law on the census but maybe Edward was her brother and the George and Louisa took them in. Elizabeth named her first daughter Louisa

I hope there is a lovely story here.
Again, you are all being so helpful, I am so grateful. Anything else you come up with keep it coming, I can't explain how happy I am, If anyone would like to view my tree it can be found on Ancestry it is the Joyner Harris family tree and my user name is CaroleFortune it is an open tree.