VIII Corps front collapsed and was a costly failure. By the only ground held by the 29th Division was the western lip of the crater. Two German platoons bombed from shell-hole to shell-hole towards the crater, forcing the survivors to retire to the British front line. RIR 119 suffered most in the mine explosion beneath the redoubt. Casualties in the 86th Brigade were whom killed and reported missing. 13 November After the detonation of the Hawthorn Ridge mine on 1 July, the Royal Engineers began work on a new mine, loaded with of ammonal, which was placed beneath the crater of the first explosion. On 13 November 1916, two brigades of the 51st (Highland) Division attacked the first objective (green line) at Station road and Beaumont-Hamel, then the final objective (yellow line) at Frankfort Trench, with three battalions, the fourth providing carrying parties. Six minutes before zero, the leading battalion of the right brigade moved beyond the British wire and advanced when the new mine at Hawthorn Crater was blown. The Scottish troops moved past the east end of Y Ravine and reached the first objective at with a stray party from the 63rd (Royal Naval) Division. The battalion pushed on and then withdrew slightly to Station Road. On the left, fire from Y Ravine held up the advance and at another battalion reinforced the attack. Troops skirted the ravine to the north and early in the afternoon, a battalion from the reserve brigade attacked Beaumont-Hamel from the south, troops in the vicinity joining in. The left flank brigade was held up by uncut wire to the south of Hawthorn Crater and by massed machine-gun fire north of the Auchonvillers–Beaumont-Hamel road. Two tanks were sent up, one bogging between the German front and support lines and the other north of the village. Consolidation began and three battalions were withdrawn to the German reserve line and reinforced at while one battalion formed a defensive flank to the south, as the positions reached by the 63rd (Royal Naval) Division on the right were unknown. Aftermath Analysis The detonation of the Hawthorn Ridge mine, ten minutes before the general attack commenced, was not considered to be the main cause of the lack of surprise on 1 July. Lanes had been cut through the British wire, bridges had been placed over rear trenches several days earlier and a bombardment had been fired at each