36th (Ulster) Division
37th Division (composed of K.1, K.2 and K.3 battalions)
38th (Welsh) Division
40th Division (originally composed of "bantam" battalions)
41st Division
107th Brigade
8th Battalion The Royal Irish Rifles (East Belfast)
9th Battalion The Royal Irish Rifles (West Belfast)
10th Battalion The Royal Irish Rifles (South Belfast)
15th Battalion The Royal Irish Rifles (North Belfast)
108th Brigade
11th Battalion The Royal Irish Rifles (South Antrim)
12th Battalion The Royal Irish Rifles (Central Antrim)
13th Battalion The Royal Irish Rifles (1st Co. Down)
9th Battalion Princess Victoria's (Co. Armagh)
109th Brigade
9th Battalion The Royal Inniskilling Fusiliers (Co. Tyrone)
10th Battalion The Royal Inniskilling Fusiiers (Derry)
11th Battalion The Royal Inniskilling Fusiliers (Donegal and Fermanagh)
14th Battalion The Royal Irish Rifles (Young Citizens)
Pioneers: 16th Battalion The Royal Irish Rifles (2nd Co. Down)
110th Brigade
6th Battalion The Leicestershire Regiment
7th Battalion The Leicestershire Regiment
8th Battalion The Leicestershire Regiment
9th Battalion The Leicestershire Regiment
111th Brigade
10th Battalion The Royal Fusiliers
13th Battalion The Royal Fusiliers
13th Battalion The King's Royal Rifle Corps
13th Battalion The Rifle Brigade
112th Brigade
11th Battalion The Royal Warwickshire Regiment
6th Battalion The Bedfordshire Regiment
8th Battalion The East Lancashire Regiment
10th Battalion The Loyal North Lancashire Regiment
113th Brigade
13th Battalion The Royal Welsh Fusiliers (1st North Wales)
14th Battalion The Royal Welsh Fusiliers
15th Battalion The Royal Welsh Fusiliers (1st London Welsh)
16th Battalion The Royal Welsh Fusiliers
114th Brigade
10th Battalion The Welsh Regiment (1st Rhondda)
13th Battalion The Welsh Regiment (2nd Rhondda)
14th Battalion The Welsh Regiment (Swansea)
15th Battalion The Welsh Regiment (Carmarthenshire)
115th Brigade
17th Battalion The Royal Welsh Fusiliers (2nd North Wales)
10th Battalion The South Wales Borderers (1st Gwent)
11th Battalion The South Wales Borderers (2nd Gwent)
16th Battalion The Welsh Regiment (Cardiff City)
Pioneers: 19th Battalion The Welsh Regiment (Glamorgan Pioneers)
39th Division
116th Brigade
11th Battalion The Royal Sussex Regiment (1st South Down)
12th Battalion The Royal Sussex Regiment (2nd South Down)
13th Battalion The Royal Sussex Regiment (3rd South Down)
14th Battalion The Hampshire Regiment (1st Porthmouth)
117th Brigade
16th Battalion The Sherwood Foresters (Chatsworth Rifles)
17th Battalion The Sherwood Foresters (Welbeck Rangers)
17th Battalion The King's Royal Rifle Corps (British Empire League)
16th Battalion The Rifle Brigade (St. Pancras)
118th Brigade
13th Battalion The East Surrey Regiment (Wandsworth)
20th Battalion The Duke of Cambridge's Own (Shoreditch)
21st Battalion The Duke of Cambridge's Own (Islington)
14th Battalion Princess Louise's
119th Brigade
19th Battalion The Royal Welsh Fusiliers
12th Battalion The South Wales Borderers (3rd Gwent)
17th Battalion The Welsh Regiment (1st Glamorgan)
18th Battalion The Welsh Regiment (2nd Glamorgan)
120th Brigade
11th Battalion The King's Own (Royal Lancaster Regiment)
13th Battalion The Cameronians
12th Battalion The Prince of Wales's Volunteers
14th Battalion The Highland Light Infantry
121st Brigade
12th Battalion The Suffolk Regiment (East Anglian)
13th Battalion Alexandra, Princess of Wales's Own
18th Battalion The Sherwood Foresters
22nd Battalion The Duke of Cambridge's Own
122nd Brigade
12th Battalion The East Surrey Regiment (Bermondsey)
15th Battalion The Hampshire Regiment (2nd Porthmouth)
11th Battalion The Queen's Own (Lewisham)
18th Battalion The King's Royal Rifle Corps (Arts and Crafts)
123rd Brigade
11th Battalion The Queen's (Lambeth)
10th Battalion The Queen's Own (Kent County)
23th Battalion The Duke of Cambridge's Own (2nd Football)
20th Battalion The Durham Light Infantry (Wearside)
124th Brigade
10th Battalion The Queen's (Battersea)
26th Battalion The Royal Fusiliers (Bankers)
32nd Battalion The Royal Fusiliers (East Ham)
21st Battalion The King's Royal Rifle Corps (Yeoman Rifles)