| Regimental number | 1621 |
| Place of birth | Hobart, Tasmania |
| Other Names | BANNISTER, William Thomas |
| School | Broadmarsh State School, Tasmania |
| Religion | Church of England |
| Occupation | Farm labourer |
| Address | Broadmarsh, Tasmania |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Mother, Mrs Annie Bannister, Broadmarsh, Tasmania |
| Previous military service | Nil |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 40th Battalion, 1st Reinforcement |
| AWM Embarkation Roll number | 23/57/2 |
| Embarkation details | Unit embarked from Hobart, Tasmania, on board HMAT A35 Berrima on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 40th Battalion |
| Fate | Killed in Action |
| Place of death or wounding | France |
| Date of death | |
| Age at death | 24 |
| Place of burial | Cite Bonjean Military Cemetery, (Plot IV, Row C, Grave No. 12), Armentieres, France |
| Panel number, Roll of Honour, Australian War Memorial | 132 |
| Miscellaneous information from cemetery records | Parents: Thomas and Annie Bannister, Dysatt, Tasmania. Born at Broadmarsh. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |