Basic Details Surname Armstrong Forenames Philip Gender Not stated on memorial Information stated on memorial War First World War (1914-1918) Served or died Died Primary Service As stated on memorial Service (Primary - Stated) R.N. Unit (Primary - Stated) H.M.S. Cornwall Sub-unit (Primary - Stated) HMS Warspite (at Jutland) Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS Cornwall Secondary Service As stated on memorial Unit (Secondary - Stated) Submarine G8 Our references Service (Secondary - Our reference) Royal Navy Unit (Secondary - Our reference) HMS G8 Death and Burial details Town of death Kattegat Year of death 1918 Month of death January Day of death 5 Manner of death as stated Killed in submarine in Kattegat Manner of death reference Killed in Action