Basic Details Surname Newbury Forenames Sidney Gender Male Information stated on memorial Alternative surname Newbery Alternative forename Sydney Thomas War First World War (1914-1918) Served or died Died Primary Service As stated on memorial Unit (Primary - Stated) R.M.L.I. Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) Royal Marine Light Infantry Death and Burial details Country of death At Sea Year of death 1918 Month of death September Day of death 16 Manner of death as stated Killed in action at sea Manner of death reference Killed in Action