November 1915) 2nd Battalion, Argyll and Sutherland Highlanders (transferred from 19th Brigade 27 November 1915) 4th (Extra Reserve) Battalion, King's (Liverpool Regiment) (Special Reserve (SR)) (joined February 1916) 1/4th Battalion, Suffolk Regiment (TF) (joined 28 February 1916 left February 1918) 98th Machine Gun Company (joined 28 April 1916, moved to 33rd Battalion M.G.C. 19 February 1918) 98th Trench Mortar Battery(formed by 30 June 1916) 99th Brigade (The brigade transferred to the 2nd Division in November 1915, swapping with the 19th Brigade.) 17th (Service) Battalion, Royal Fusiliers (Empire) 22nd (Service) Battalion, Royal Fusiliers (Kensington) 23rd (Service) Battalion, Royal Fusiliers (1st Sportsman's) 24th (Service) Battalion, Royal Fusiliers (2nd Sportsman's) 100th Brigade 13th (Service) Battalion, Essex Regiment (West Ham) (left 22 December 1915) 16th (Service) Battalion, Middlesex Regiment (Public Schools) (left 25 February 1916) 17th (Service) Battalion, Middlesex Regiment (1st Football) (Left 8 December 1915) 16th (Service) Battalion, King's Royal Rifle Corps (Church Lads' Brigade), 1st Battalion, Queen's (Royal West Surrey Regiment) (joined 15 December 1915 transferred to 19th Brigade 14 February 1918) 2nd Battalion, Worcestershire Regiment (joined 20 December 1915) 1/6th Battalion Cameronians (Scottish Rifles) (TF) (joined and left February 1918) 1/9th Battalion (Glasgow Highlanders), Highland Light Infantry (TF) (joined 29 May 1916) 100th Machine Gun Company (joined 28 April 1916, moved to 33rd Battalion M.G.C. 19 February 1918) 100th Trench Mortar Battery (formed by 13 June 1916) Divisional Troops 18th (Service) Battalion, (1st Public Works Pioneers), Middlesex Regiment (joined as Divisional Pioneer Battalion July 1915) 19th Motor Machine Gun Battery (joined November 1915 but left 6 February 1916) 248th Machine Gun Company (joined 21 July 1917, moved to 33rd Battalion M.G.C. 19 Feb 1918) 33rd Battalion M.G.C. (formed 19 February 1918 absorbing the brigade MG companies) Divisional Mounted Troops F Squadron, North Irish Horse (joined January 1915, redesignated B Sqn on 25 May 1916, left 19 April 1916) 33rd Divisional Cyclist Company, Army Cyclist Corps (left 19 April 1916) 33rd Divisional Train Army Service Corps 225th, 226th, 227th and 228th Companies (transferred to 29th Division in March 1916) 170th, 171st, 172nd and 173rd Companies, (transferred from 28th Divisional Train on 13 November 1915. 172nd Company swapped with the 8th Company from 2nd Divisional Train in late November 1915) 43rd Mobile Veterinary Section Army Veterinary Corps 230th Divisional Employment Company (joined 1 June 1917) 33rd (Camberwell) Divisional Artillery CLVI (Camberwell) Brigade, Royal Field Artillery (R.F.A.) CLXII (Camberwell) Brigade, R.F.A. CLXVI (Camberwell) Brigade,