Basic Details Surname Gallagher Forenames John 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) Army Unit (Primary - Stated) London Regiment Sub-unit (Primary - Stated) 20th Battalion Our References Service (Primary - Our reference) British Army Unit (Primary - Our reference) 20th Battalion London Regiment (Blackheath and Woolwich)