In memoriam published 22nd January 1918 in the Nottingham Evening Post :-
“MURPHY. – Reported missing May 3rd, 1917, now reported killed, Pte. W. Murphy (Billy), Royal Warwicks (late Sherwoods), aged 19, dearly beloved son of Mr. and Mrs. Murphy, 36 St. Matthias-road. Deeply mourned. – From his sorrowing mother, father, brother Tom (in France), and sisters Mabel and Alice.
“MURPHY. – Missing May 3rd, now official reported killed, Pte. W. Murphy, Royal Warwicks. – From sorrowing Aunt Lizzie, Uncle Tom, and cousins Maggie, Bertha, & Bonnie.
“MURPHY. – Reported missing May 3rd, now reported killed, Pte. W. Murphy (Billy), Royal Warwicks (late Sherwoods). He bravely answered duty's call, he gave his young life for one and all. – From his sorrowing grandma and granddad Cleaver, Aunt Harriett, cousins and Uncle Joe (in France).”
Above in memoriam are courtesy of Jim Grundy and his facebook pages Small Town Great War Hucknall 1914-1918
It would appear that Williams father, John William Flinders Murphy enlisted into the Army following his sons death as an army service record exists for him, he attested on 18th April 1918 in Nottingham and was posted to the reserves , he was 50 yrs and 5 months old, he gave his wife Charlotte as his next of kin and his address as 36 St Matthias Road, Nottingham, he was a GPO engineer, he was called up on 20th June 1918 and the following day once again put into the reserves, he was discharged on 14th December 1918 being surplus to requirements.
