Hi Ray,
'My' Lois Mary shows in the 1911 census, in Oundle, born Hampton Court. I plumped for the Kingston birth as it's right by Hampton Court, and is a Lois Mary rather than just 'M'.
The birth cert will hopefully help as it should eliminate her if she is the wrong one, but I am mystified that there is no sign of her in 1901. I've searched both the usual websites.
Caroline.