There was no relief for either CLV Bde or the Guards' artillery, which continued in action under 3rd Division, with the horses suffering from shortage of water as well as shellfire. The guns covered 3rd Division's infantry as they captured Écoust-Saint-Mein, Longatte and Lagnicourt-Marcel over 29–31 August. First and Third Armies then attacked in a set-piece action (the Battle of the Drocourt-Quéant Switch Line) on 2 September. 8th Brigade led 3rd Division's advance, its three battalions in line supported by the fire of no less than seven brigades of field artillery (including CLV) and two of heavies. The barrage was excellent and at first good progress was made, but the supporting tanks got bogged down, and so did the divisional attack. However, with the 'D–Q' Line broken, the Germans began a withdrawal that night to the line of the Canal du Nord. CLV Brigade reverted to the Guards Division, which passed through 3rd Division on 3 September and attacked behind a creeping barrage, but finding no enemy in front was able to make a advance.