The Second World War
The Motor Machine Gun Brigades were formed in May and June 1940. They were formed to provide a rapid reaction force to the potential invasion threat.
| Date formed: | 30 May 1940 |
| Date disbanded: | 12 October 1940 – Reorganised and redesignated as 26th Armoured Brigade. |
| Commander: | Brigadier M.B. Burrows |
| Units | |
| 16th/5th Lancers | 30 May 1940 to 11 October 1940 |
| 17th/21st Lancers | 30 May 1940 to 11 October 1940 |
| 2nd Lothians and Border Horse | 12 June 1940 to 11 October 1940 |
| Higher formations served under: | |
| Eastern Command (UK) | 30 May 1940 to 11 June 1940 |
| 12 Corps (UK) | 11 June 1940 to 11 October 1940 |
