Basic Details Surname Slinsby Forenames John Gender unknown Information stated on memorial War First World War (1914-1918) Served or died Died Primary Service As stated on memorial Sub-unit (Primary - Stated) HMS Formidable Rank / Title (Primary - Stated) Midshipman Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS Formidable Rank / Title (Primary - Our reference) Midshipman