So, working out the history of the bathroom over the years reminds me that I did do a bit of work on who used to live in our house.
We know it was built around 1910 so the first port of call was the 1911 census.
Even with 5 in the house it must have been fairly room and pleasant - to be in a brand new house but I was surprised she's there as a widow - so I did a bit more digging and she turns up on the 1901 census - married to an engineer called George and living on Newport Rd.
Since it's not actually my family I'm not doing much more research but when the 1921 census comes out I'll be sure to have another look to see if she's still there - or if not her, then who.