A great deal of constructional work was immediately necessary in assembly and communication trenches, as well as in the completion of the necessary advanced dumps of munitions and stores of all kinds. Working parties from the Battalion, of the greatest available strength, began work on part of these tasks on the night of the 4th, the new trenches to be dug comprising communications to join Rainy with Shamrock and with a small advanced position on the crest of the ridge overlooking Le Transloy. In addition the road at Rainy was barricaded. Large working parties were also provided by the Kensingtons to provide an advanced assembly position for the attack by connecting Rainy and Foggy, and by the Cheshire Pioneers and the R.E.'s on other tasks. This latter task, however, could not be completed in one night and was continued the following evening. The shocking state of the ground prevented it from ever being finished, and on the day of the attack only about 150 yards of trench had been added to Foggy. On the night of the 6/7th also a fresh assembly trench for the use of the centre battalion was taped out by the Brigade Major, and dug by the Kensingtons. This work was called New Trench. Although the weather once again had embarked on a dry spell the long continued rains had rendered working tasks immensely difficult of accomplishment, and the tenacious character of the mud added incalculably to the labour of digging and of reaching the site of the work. The isolation of the various tasks in this appalling swamp, from which every landmark had been swept out of existence, and the constant harassing fire of the enemy's machine-gunners, caused great delays to working parties in even locating their work, and all these factors together tended to reduce the work actually carried out far below expectations. The Battalion, not being originally detailed for the assault, was relieved in the trenches on the evening of the 5th by the Rangers and moved by companies on relief to bivouacs between Ginchy and Guillemont, leaving A and C Companies in line for the completion of their tasks begun the previous night. The following day, however, intimation was received of a change of orders, and the Battalion returned to the trenches that night as the centre assaulting battalion of the Brigade, its place in brigade support being taken by the Kensingtons.