Unit History
Formation
; 17th Brigade (from October 11 1915) :
- 1st Battalion, the Royal Fusiliers
- 3rd Battalion, the Rifle Brigade
- 12th (Service) Battalion, the Royal Fusiliers (from 73rd Bde. disbanded February 1918)
- 8th (Service) Battalion , the Queen's Royal West Surrey Regiment (from 72nd Bde. February 1918)
- 8th (Service) Battalion , the Buffs (East Kent) Regiment (from 72nd Bde. disbanded February 1918)
- 1/2nd (City of London) Battalion, the London Regiment (until February 1916)
The brigade joined the division from the 6th Division in October 1915, swapping with the 71st Brigade.
; 71st Brigade (until October 11, 1915) :
- 9th (Service) Battalion, the Norfolk Regiment
- 9th (Service) Battalion, the Suffolk Regiment
- 8th (Service) Battalion, the Bedfordshire Regiment
- 11th (Service) Battalion, the Essex Regiment
The brigade moved to the 6th Division in October 1915, swapping with the 17th brigade.
; 72nd Brigade :
- 8th (Service) Battalion , the Queen's Royal West Surrey Regiment (to 17th Bde. February 1918)
- 8th (Service) Battalion , the Buffs (East Kent) Regiment (to 17th Bde. October 1915)
- 9th (Service) Battalion, the East Surrey Regiment
- 8th (Service) Battalion, the Royal West Kent Regiment
- 1st Battalion, the Prince of Wales's (North Staffordshire Regiment) (from October 1915)
; 73rd Brigade :
- 12th (Service) Battalion, the Royal Fusiliers (to 17th Bde. October 1915)
- 9th (Service) Battalion, the Royal Sussex Regiment
- 7th (Service) Battalion, the Northamptonshire Regiment
- 13th (Service) Battalion, the Middlesex Regiment
- 2nd Battalion, the Prince of Wales's Leinster Regiment (Royal Canadians) (from 17th Bde. October 1915 until February 1918)
