The division was relieved on the night of 14/15 August, but the divisional artillery remained in the line supporting other formations. 55th (West Lancashire) Division came back into the line on 4/5 September, facing Ginchy and Delville Wood, where it launched an attack on 9 September (in the Battle of Ginchy). The divisional and heavy artillery began a deliberate bombardment at 07.00 and continued to Zero hour (16.45), when the field artillery fired a creeping barrage behind which the infantry advanced. The German artillery replied to the bombardment by shelling the support trenches and firing gas shells into the battery positions. The leading infantry companies followed the barrage closely and attacked 'Hop Alley', 'Ale Alley' and 'Pint Trench', but Hop Alley proved stronger than expected and there was an additional hidden trench that had not been discovered or bombarded. The rest of the divisional attack was successful, and another attempt on the Hop Alley–Ale Alley complex was made two days later by a surprise attack without artillery preparation, which was also unsuccessful.