Hi,
I have tried to find HGH's merchant navy records for WW2 by looking on "World War 2 Nominal roll" and Australian Maritime Safety Authority" websites. There is a Henry George Hull but he's way too young was born in Victoria and was a soldier. I have also tried to find him i lists of immigrants from 1940 to 1945, again without success.
Regarding the details of his address and next of kin given when he signed off the BRITANNIC 30/7/1940, the address of 57 Dean Road, Bitterne, Southampton is 100% right. In fact I also lived there until the age of 9 when the place burnt down! There is a small cul-de-sac of houses there now called Peppard Close. Harder to explain is why he gave his next of kin as Ethel. His wife was Rose Edith Hull, so perhaps, for some reason , he purposely gave false information or was Ethel his "bit on the side" that he apparently had in Liverpool? It would be impossible to prove though.
The info about the tug called St. Anne is interesting. My Mum reminded me that in July 1987 I did my work experience for Red Funnel Tugs in Southampton and that one of the several ships we brought in was the QE2.