Authorised by Army Council Instruction 1209 of 1916, the Middlesex Regiment formed two labour battalions, numbered 30th and 31st (Works) Battalions, manned by recruits who were naturalised British citizens but of enemy alien parentage. The men mainly came from German backgrounds and were for the most part not of low medical grade (such as was the case with the units of the Labour Corps). The two units remained in England as part of the regiment and were never transferred to the Labour Corps.
The Infantry Labour Companies are formed
In addition to the two battalions, the regiment raised eight Infantry Labour Companies from these men. As far as can be determined the two battalions acted as a depot for the ILCs. Very little is known of the activities of these units, except that they came under authority of the GHQ Labour Directorate and proceeded to France as follows:
1 (Alien) Infantry Labour Company – 6 March 1917
2 Infantry Labour Company – 2 April 1917
3 Infantry Labour Company – 14 March 1917
4 Infantry Labour Company – 26 March 1917
5 Infantry Labour Company – April 1917?
6 Infantry Labour Company – April 1917?
7 Infantry Labour Company – July 1917?
8 Infantry Labour Company – December 1917?
Some men of enemy alien parentage were transferred into these units from others, where they had already been serving, and in some cases protests were made at the loss to the original unit of a good, experienced man. This was recognised by the issue of Army Council Instruction 1613 of August 1916, which allowed the original units to retain such men if needed.
It is known that 4 ILC was working in Nieppe Forest in June 1917.
In all the eight ILCs numbered some 4000 men.