It looks like his father George Angelo Herbert had five siblings, who were born between 1879 and 1893 in the Dulwich/Camberwell/Lambeth area. They are:
– Thomas Edwin Herbert
– Charles Crisp Herbert
– Eveline Amelia Herbert
– Annie Grace Herbert
– William Albert Stanley Herbert
It seems that William married Olive Louise Shorter, and had a child John B. Herbert.
Do you have any of these fine folks in your family tree? Maybe you’re a cousin of George Racine…