Thank you for all your thoughts; sounds like an interesting book.
I don't know about Auntie Eileen, but I don't think the NHS existed ca. 1910.
The problem is not diagnosing what he died of exactly, or how it was phrased. At the moment I simply can't find a suitable death certificate to order.
In looking for his data to give you, I see that I never found his exact birth information either! Oops.
I know he existed because I have a photo of him.
So, it appears that all I have is that he was born about 1890 in Kentish Town, and died at the age of about 20, living in same area, of TB.
On the 1901 census he is 10 years old, b. Pancras. His name is Harry William WEST.