Major-General
* 3rd of November 1897
† 4th of August 1988
(Grenadier Guards)
Nickname: Baronet Adair
| 1940-05-08 | Acting Lieutenant-Colonel |
| 1940-08-08 | Temporary Lieutenant-Colonel |
| 1940-09-19 | Lieutenant-Colonel |
| 1940-10-17 | Acting Colonel |
| 1940-10-17 | Acting Brigadier |
| 1941-04-17 | Temporary Colonel |
| 1941-04-17 | Temporary Brigadier |
| 1942-09-21 | Acting Major-General |
| 1943-06-30 | Colonel |
| 1943-09-21 | Temporary Major-General |
| 1946-07-25 | Major-General (Dated back to 1944-11-12) |
| 1940-05-08 | – | 1940-XX-XX | Commanding Officer 3rd Battalion Grenadier Guards |
| 1940-10-17 | – | 1941-09-15 | Commanding Officer 30th Independent Brigade |
| 1941-09-15 | – | 1942-09-21 | Commanding Officer 6th Guards Armoured Brigade |
| 1942-09-12 | – | 1942-09-21 | Acting General Officer Commanding Guards Armoured Division |
| 1942-09-21 | – | 1945-06-12 | General Officer Commanding Guards Armoured Division [Northwestern Europe] |
| 1945-06-12 | – | 1945-XX-XX | General Officer Commanding Guards Division |
| 1945-12-XX | – | 1946-11-14 | General Officer Commanding 13th Infantry Division [Greece] |
| 1947-03-11 | Retired | ||
| 1960-12-19 | – | 1975-01-01 | Colonel, Grenadiers Guards |