Just for you Trish -from the Electoral Rolls
1914
TULLOCH John William 144 Heath Street, Port Melbourne Occ Labourer
[Perhaps Winifred was too young to vote or hadn't enrolled]
1914
THOMAS Alexander 143 Heath Street, Port Melbourne Occ Labourer
THOMAS Louisa Elizabeth 143 Heath Street, Port Melbourne
1919
TULLOCH Winifred 144 Heath Street, Port Melbourne Occ Labourer [No husband enrolled at this address and no death for Jn Wm between 1914 and 1920 and no WW1 service record]
and
Birth
TULLOCH Robert
Father John Wm Mother Winifred Louise MADDEN
Birth Place PT MELB 1915
Reg#33305
Later Electoral Rolls records for Winifred show two more enrolments for Port Melbourne and then she moved to Mitcham in 1936 - no other Tullochs with her at any of the addresses.
Now Trish what do you think?
Cando
Hi Cando
Sorry, I had to go out - my next task was going to be to check the electoral roles

It seems quite likely that the Howes may not have enrolled to vote - being British they could enrol in those days - no citizenship required. I'm thinking if Mrs Thomas had a package for him - it may have been from his mother?
Now I will have to check if the Tullock family were divorced - probably not relevant, but it would be nice to find the sister. The war records are amazing - I have a letter written by my grandmother on my grandfather's record for WWI & researched one family where the sisters wrote for information because they didn't talk to the wife, who received all the "next of kin" information.

Watching WDYTYA last night, it was mentioned about the English WWI records being lost in the blitz - we are so very lucky to have this cotact with the past
Trish
Edit: The only possible death I see is for a Laura Isabel Winifred Tulloch, died 1981 aged 86 - no parents given (of course)