Further over the Churchyard I see more lights at the memorial
...and bunches of flowers
The Churchyard was devoid of people (the living that is!), so with no one to ask, I decide to come back the next day and have a look at the grave with the candles
ABLE SEAMAN RN 144449
3RD APRIL 1919 AGED 42
I decided to research further and found Andrew Musto's place of death to be HMS Victory, Portsmouth. The cause of death given is illness.
The HMS Victory referred to here is not Nelson's flagship of Trafalgar fame. HMS Victory was used in WW1 as the name of Portsmouth Barracks.
So I am left no wiser as to why the candles and flowers!