Command of the 2nd London was given to Major-General Harry Willans, who had previously commanded the 2nd London Infantry Brigade. On formation, the 4th London Brigade consisted of the 11th and 12th Battalions, Royal Fusiliers, and the 2nd Battalion, London Irish Rifles (Royal Ulster Rifles). The 5th London Brigade was made up of the 2nd Battalion, Queen's Westminsters (King's Royal Rifle Corps), the 2nd Battalion, London Scottish (Gordon Highlanders), and the 2nd Battalion, London Rifle Brigade (Rifle Brigade).
The command of the 2nd London was taken over by Major-General Harry Willans, who had previously led the 2nd London Infantry Brigade. Initially, the 4th London Brigade consisted of the 11th and 12th Battalions, Royal Fusiliers, along with the 2nd Battalion, London Irish Rifles (Royal Ulster Rifles). The 5th London Brigade was formed by combining the 2nd Battalion, Queen's Westminsters (King's Royal Rifle Corps), the 2nd Battalion, London Scottish (Gordon Highlanders), and the 2nd Battalion, London Rifle Brigade (Rifle Brigade).