Thank you for this answer. This will assist when I approach the Victorian law office responsible for registering new solicitors.
The grandfather in question was probably over 45 years old when he married in 1925 - it is possible he was previously married in the UK but we're unaware of any relations apart from the children he had in Australia - all of whom I have interviewed.
West Yorkshire Regiment
He did leave a cap badge but no other medals.
I will try their museum again - this time to see if they have records of men who were denied medals (e.g. having been through a court martial.
David in Bunbury