Basic Details Surname Dempsey Forenames William Gender Male Information stated on memorial War First World War (1914-1918) Served or died Served Honours D.S.M. Notes First World War (1914-1918) LAMLASH Primary Service As stated on memorial Service (Primary - Stated) Royal Navy Unit (Primary - Stated) The Navy Sub-unit (Primary - Stated) Submarine E7 Rank / Title (Primary - Stated) L.S. Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS E7 Rank / Title (Primary - Our reference) Leading Seaman