In July 51st (Highland) Division joined in the Somme Offensive. An attack on 14 July had failed to capture the dominating ground of High Wood, and 51st (H) Division was tasked with renewing the attack on High Wood a week later. A night attack was to be tried: the bombardment began at 19.00 on 22 July, under the direction of low-flying artillery observation aircraft. German sources reported that the shelling was of 'painful accuracy' and prevented the troops in High Wood from being relieved, despite the number of casualties they suffered. At 01.30 the following morning the division attacked, but by 03.00 they were back on their start line having suffered heavy casualties of their own. British gunners had difficulty supporting attacks on High Wood, because they had to fire over Bazentin Ridge. The low elevation of the guns meant that shells skimmed the British trenches, the margin for error was small and numerous complaints were made that British infantry casualties were caused by friendly fire. Worn guns, defective ammunition and inaccurate information about the location of British infantry positions were blamed for short-shooting. The setback seemed to confirm the division's nickname of 'Harper's Duds' (from their commander, Major-General George Harper, and their 'HD' formation badge). The division was withdrawn from the front on 7 August for rest and reorganisation. On 23 August CCLVI Bde was reorganised again: B Bty and the Left Section of C Bty of CCLVIII Bde joined to make A, B and C Btys up to six 18-pounders each.