Original Labour Battalions formed under Army Council Instruction 611 of 1917
| Labour Battalion number | Formed from regiment | Unit | Men numbered from | to |
|---|---|---|---|---|
| 1 | King's (Liverpool Regiment) | 23rd (Works) Battalion | 126841 | 132640 |
| 2 | King's (Liverpool Regiment) | 27th (Works) Battalion | 132641 | 134640 |
| 3 | Devonshire Regiment | 13th (Works) Battalion | 134641 | 146640 |
| 4 | Royal Scots Fusiliers | 10th (Works) Battalion | 146641 | 149140 |
| 5 | Middlesex Regiment | 29th (Works) Battalion | 149141 | 162140 |
| 6 | Middlesex Regiment | 33rd Battalion | 162141 | 164140 |
| 7 | Durham Light Infantry | 25th (Works) Battalion | 164141 | 170140 |