Basic Details Surname Cassels Forenames Frank Lionel Gender Male Information stated on memorial War First World War (1914-1918) Served or died Died Primary Service As stated on memorial Unit (Primary - Stated) RE Rank / Title (Primary - Stated) Lieutenant Our References Service (Primary - Our reference) British Army Unit (Primary - Our reference) Royal Engineers Rank / Title (Primary - Our reference) Lieutenant Death and Burial details Country of death France Country of burial Frane Town of burial Mametz Cemetery Flatiron Copse Cemetery Year of death 1916 Month of death July Day of death 30 Age at death 33 Manner of death as stated Killed in action Manner of death reference Killed in Action