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Probably the below:

NAME:                      Bowles, William Charles
RANK:                      Petty Officer
UNIT:                      Royal Navy
BATTALION ETC:             HMS Voltaire
REGIMENTAL NUMBER:         P/JX 126271
HOW DIED/DATE OF DEATH:    9th April 1941
WHERE BURIED/COMMEMORATED: Portsmouth Naval Memorial, Hampshire, UK
OTHER INFORMATION:         Age 31. Son of William Charles and Florence Bowles.
                           Husband of Mary Bowles.