On the night of the 3rd/4th June the 2/4th Londons relieved the 2/2nd Londons in the left subsector, A and B Companies (Cotton and Bottomley) occupying the forward posts with C and D Companies (Hewlett and Parker) in support. The line opposed to the Battalion was entirely in front of the Heninel-Bullecourt Road, with a support line about 200 yards in rear of it. For the greater part the line ran straight, but two small salients, the Knuckle and the Hump, had been developed into strong points of no mean order. The whole line was heavily wired, and although the entanglements had suffered from our shell fire they still presented a formidable obstacle, while the patrols sent forward nightly from our posts obtained clear evidence that the line was held in unusual strength. The most urgent work in this sector was the linking up of our scattered shell hole posts to form a connected line, and this was pushed on with all possible speed and completed by the night of the 10th. Throughout this tour of duty the enemy continued a fairly vigorous bombardment of our trenches and back areas, which was returned with interest by our artillery. On the night of the 11th/12th June the 2/1st Londons took over from A, B and D Companies, while C Company was relieved by the 2/7th Londons (174th Brigade). On relief the Battalion withdrew in support to St Leger, where Headquarters opened at the Château. During the days spent in support the Battalion was reinforced by a large draft of N.C.O.'s and men, and by two officers, 2/Lieuts. C. Potter and V. R. Oldrey. The latter officer was most unfortunately hit by a stray bullet on the following day. The principal duty of the three days following relief was the organisation and special training of A, B and D Companies to take part in an assault of the Hindenburg system opposite the Brigade front. The front of attack extended from the sharp corner just south of the Knuckle on the right to a point about 150 yards north of the Hump on the left. As the proposed operation included the capture of two lines of trench it was decided by Corps to divide it into two days' work in order to simplify the question of the co-operation of the 21st Division on the left. Accordingly the plan was that the first day the 173rd Brigade should capture the allotted portion of the front line, while the second day the area of operations should be extended and the 21st Division on the left should join with the 173rd Brigade in the assault of the support line.