At seven that night the Battalion moved forward from Dickebusch to Château Segard, the move being completed by 11 p.m. Shortly after dawn on the 15th the forward move was continued to Railway Dugouts, in the cutting between Shrapnel Corner and Zillebeeke Lake, and here the Battalion remained during the day. The 15th August was occupied in issuing battle equipment and rations to the companies, while Lieut.-Col. Marchment took the opportunity of conducting a reconnaissance of the forward area and communications, and of issuing his operation orders. These were explained to company commanders as adequately as time permitted, but it must be borne in mind that when the Battalion moved forward to the assault the following morning no company or platoon officer had been able to see the ground over which he was to lead his men. At 6.30 p.m. the 1/4th Londons left Railway Dugouts in battle order for the assembly area at Clapham Junction with guides supplied from the 53rd Brigade. A great deal of heavy shelling, in which four men of B Company were hit, was experienced during the advance, and in breasting a ridge near Sanctuary Wood the Battalion had to pass through a barrage put down by the Germans. Aided by the excellent discipline of the troops, however, company commanders were able to split up their companies within a few seconds, and no loss was sustained. By ten o'clock the Battalion was concentrated with A, B and C Companies in the tunnel under the Menin Road, and D Company in the trench south of the road. Battalion Headquarters and part of C Company were in the trench on the north side of the tunnel. There was no defined line of trenches in this area, the front being held by isolated shell hole posts, and the assembly was to be made on tape lines laid down under staff arrangements. The lack of shelter thus made it necessary to keep the Battalion under such cover as was obtainable till the last possible moment. During the evening an officer of each company reconnoitred the route from the concentration area to the tape lines, assistance being rendered by the 6th Royal Berkshires, and No Man's Land in front of the line of assembly was patrolled until shortly before zero hour. The intention was to advance in a practically due east direction, while at stated points in the line of advance platoons would halt one by one, each establishing itself in a strong point, until finally, when the last platoon reached its halting point, the whole Battalion would be deployed in a line of outposts, all of which would turn to their right and face south. This advance, being made on a front of two companies, would result in a double line of posts of which the left flank would rest on Black Watch Corner in touch with the 169th Brigade, while the right flank would join hands with the 7th Bedfords in the corner of Inverness Copse.