La Bassée
170th Tunnelling Company was next deployed under the command of 2nd Division on operations near Cuinchy and against the German position known as "Brick stacks" near La Bassée Canal in the vicinity of Cuinchy in summer 1915. 176th Tunnelling Company was also deployed under the command of 2nd Division near Cuinchy at that time, as was the 173rd Tunnelling Company.