| 03-Sep-1939 | 03-Sep-1939 | Active | | Second Line Territorial Brigade in the United Kingdom. |
| 28-May-1940 | 28-May-1940 | Converted to | X | 2 Motor Machine Gun Brigade |
| 10-Dec-1940 | 10-Dec-1940 | Converted from | X | 2 Motor Machine Gun Brigade |
| 01-Jun-1942 | 01-Jun-1942 | Renamed | | Renamed 25 Tank Brigade. |
| 05-Jan-1945 | 05-Jan-1945 | Converted to | | Converted to 25 Armoured Assault Brigade Royal Engineers. |