First Army had issued orders at 11.30pm for consolidation of the line, and the pulling out of a new general reserve from the 9th and 15th Divisions, now being relieved. XI Corps were ordered to examine ways to recapture the dominant Hill 70 position.

There was again mist, low cloud and rain all day.

At around 4.00pm, 3rd Guards Brigade is caught by a heavy artillery barrage while moving in column of fours along the Vermelles-Loos road near the original front line trenches. They were on their way to attack Hill 70 through Loos. Many casualties are incurred.

6.00pm An attack on Hill 70 is made by the Welsh Guards, but it is destroyed by machine-gun fire from the Redoubt at the summit.

6.00pm Units of 47th Division attack and capture Chalk Pit Copse.

At 4.40pm, under cover of a thick smoke screen, 2nd Guards Brigade advanced to Chalk Pit Wood and the Chalk Pit. A further advance to the buildings at Puits 14 bis was halted by machine-gun fire from Bois Hugo.

Midnight Heavy enemy shelling of Fosse 8, tracks to the North (Trois Cabarets) and communication trenches leading up to the Hohenzollern Redoubt continues throughout the night.

2.30am An attack against Fosse 8 by the 1/Royal Berkshires, detached from Carter's Force, is halted 70 yards from their objective, after crossing half a moonlit mile under fire.

Dawn German infantry attacks 21st Brigade in Stone Alley, adjacent to Vermelles-Hulluch road, but is beaten off by 2/Wiltshires. Shortly afterwards, an enemy attack in battalion strength hits 73rd Brigade in Fosse and Slag Alleys. (The men of this Brigade holding the positions east of Fosse 8 are in an exhausted condition, having had no food, water or sleep for 48 hours.) 7/Northamptonshires are forced back to cottages at Corons de Pekin, North of the Fosse 8 Dump. The enemy places a heavy machine-gun on the slopes of the Dump, and brings the area between the Dump and the Hohenzollern Redoubt under fire.

12.00 noon Further German troops push against the 12/Royal Fusiliers, and Brigade decides to withdraw, to establish a new line along the Eastern face of the Redoubt and a good field of fire against the Dump. At this time Major-General Thesiger, OC 9th Division, is killed while investigating the situation.

2.00pm The loss of Fosse 8 is now known at First Army HQ. A proposed attack by Guards Division on Hill 70 was abandoned at the last minute.

3.00pm Major-General Bulfin, OC 28th Division which is on the way to the battle area from Bailleul, arrives to take command of the sector. He receives an order to counterattack to retake the lost positions, using 26th Brigade. After the heavy fighting of the last days, this Brigade musters only some 600 men. They suffer further casualties in moving up, but succeed in joining the hard-pressed 73rd Brigade in the Redoubt. At the same time, German grenadiers attack along Fosse Alley, forcing the remnants of the 10/Argyll & Sutherland Highlanders and the 9/Scottish Rifles to withdraw. The move to Quarry Trench and Big Willie Trench.

2nd Division plans to make an attack are cancelled after the commencement of a release of gas, which once again hangs in British positions.

The forward British positions across the battlefield are by now thinly held. The units that had attacked on the 25th are exhausted, and the reserves scattered. The vital positions at Fosse 8, the Quarries and Hill 70 have all been lost. German strength was increasing as the failure of French Tenth Army fails to occupy their reserves. It was time to regroup, and rethink. The Big Push had broken into the enemy positions, but not through them.