A Machine Gun Company was attached to each Infantry Brigade and their subsequent Division.
| Brigade attached to: | 25th Brigade |
| Division attached to: | 8th Division |
| Formed from the: | Machine Gun Section of 2nd Bn. The Lincolnshire Regiment |
| Machine Gun Section of 2nd Bn. The Royal Berkshire Regiment | |
| Machine Gun Section of 2nd Bn. The Royal Irish Rifles | |
| Machine Gun Section of 2nd Bn. The Rifle Brigade |
The 25th Bde. M.G. Coy. was formed on 19 January 1916 from the Machine Gun Sections of the listed infantry battalions.
On 20 April 1918, it was amalgamated with the 23rd, 24th and 218th Machine Gun Companies to form No. 8 Battalion, Machine Gun Corps.
As a unit of the 8th Infantry Division, it will have taken part in the following battles and engagements.
| 1916 | |
| BATTLES OF THE SOMME | |
| 01 July | Battle of Albert [III. Corps, Fourth Army]. |
| 23 to 30 October | Attack on le Tresnoy [XIV. Corps, Fourth Army]. |
| 1917 | |
| 04 March | Bouchavesnes [XV. Corps, Fourth Army]. |
| 14 March to 05 April | German Retreat to the Hindenburg Line [XV. Corps, Fourth Army]. |
| BATTLES OF YPRES | |
| 31 July and 01 August | Battle of Pilckem Ridge [II. Corps, Fifth Army]. |
| 31 July | Attack on Westhoek. |
| 16 to 18 August | Battle of Langemarck [II. Corps, Fifth Army]. |
| 02 December | Assault of Southern Redoubt, Passchedaele (25th Bde.) [VIII. Corps, Second Army]. |
| 1918 | |
| FIRST BATTLES OF THE SOMME | |
| 23 March | Battle of St. Quentin [XIX. Corps, Fifth Army]. |
| 24 and 25 March | Actions at the Somme Crossings [XIX. Corps, Fifth Army]. |
| 26 and 27 March | Battle of Rosieres [XIX. Corps, Fifth Army]. |