The only other information relating to James on the marriage certificate is his address: Vera Road, Fulham (House number not very clear, possibly 11B).
Blanche is Blanche Elizabeth Lewis, aged 21, same address, father Osmund Lewis (deceased), father's occupation Lawyer's Clerk.
Witnesses were Amy Randall and M Durrant.
Blanche was born in Battersea and the family lived at various addresses in Battersea, Pimlico and Chelsea.
I don't think there were any children from the marriage, but I can't find Blanche on the 1911 British census, and I can't find James on any British census.
As for Blanche's death -hmmm. Well there is a Blanche Elizabeth Clewes of the right sort of age who died in Lambeth Hospital in 1927. The entry in the National Probate Calendar says she was the wife of James. Can't say for certain it's the same Blanche but what would the implications of that be?