This sector was assaulted by various regular and territorial units of the British 4th Division, predominantly the 1/6th and 1/8th Royal Warwicks, on July 1st. The Heidenkopf, a salient extending forward from the German front line, was considered indefensible as it lay on an exposed forward slope, and it had been mined by the garrison with a view to destroying any force that should occupy it. Some accounts relate that the charges were blown early, burying several of the defenders instead, and the British initially fought their way into and through the web of trenches. However, fierce enemy artillery and enfilading machine gun barrages cut the troops occupying the redoubt off from either reinforcement or resupply, and vigorous bombing attacks along the trenches from the flanks eventually forced the surviving attackers back across no-man's land in the early hours of the 2nd July. That morning only 142 survivors of the 1,450 Royal Warwicks who had set out across no-man's land the previous day were present at roll-call.