| Name | Sidney DUFF |
| Rank/Number | Private / 5658 |
| Regiment/Unit | Royal West Surrey (The Queens) Regiment / 7th Battalion |
| Enlisted | Kingston, Surrey |
| Age/Date of death | 35 / 01 Jul 1916 |
| How died/Theatre of war | Killed in action / France & Flanders |
| Residence at death | |
| Cemetery | Dantzig Alley British Cemetery, Mametz,Somme, France |
| Grave Reference | VIII.N.2 |
| Location of memorial | Buckingham - not on War Memorial |
| Date/Place of birth | c1881 / Carshalton, Surrey |
| Date/Place of baptism | |
| Occupation of Casualty | |
| Parents/Occupation | Charles & Charlotte Duff / brickayers labourer |
| Parents' Address | |
| Wife | Hilda Winifred Duff nee French |
| Wife's Address | 21 Mitre Stree, Buckingham |
| Notes | Service Papers on Ancestry |