Basic Details Surname Warren Forenames Harold Gender Male Information stated on memorial War First World War (1914-1918) Served or died Died Primary Service As stated on memorial Service (Primary - Stated) Navy (RN) Unit (Primary - Stated) HMS Queen Mary Rank / Title (Primary - Stated) 1st Class Stoker Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS Queen Mary Rank / Title (Primary - Our reference) Stoker 1st Class Death and Burial details Country of death Battle Of Jutland Year of death 1916 Month of death May Day of death 31 Manner of death as stated Killed In Action Manner of death reference Killed in Action