The commanders of the 60th (London) and 74th (Yeomanry) Divisions decided to begin the main assault at 12:15, screened by dust and smoke from another bombardment. Four brigades—the 179th, the 181st, (60th Division) the 231st and the 230th (74th Division)—launched the attack with two battalions in the first line (except the 181st Brigade, which deployed three). The first-line battalions were mainly organised with two of their "four companies in first line, each on a front of two platoons, the companies in two 'waves' each of two lines", advancing between apart with a third wave to follow (if required) behind. The 2/22nd Battalion, London Regiment remained to guard Hill 1070.