The big attack in the Salient at Tobruk on 3 August 1941

We already had some idea that this attack would be challenging. The major sticking points were the reduced force being used and the greatly improved enemy defensive positions. Lt-Col.Lloyd's battalion had substantial artillery support. The support included most of the 51st Field Regiment along with a battery from the 107th RHA and "three troops of the 2/12th Field Regiment". The 2/43rd Battalion also had support from bits and pieces of artillery units. There was the usual unified command of counter-battery fire. There was also machine gun support drawn from the Royal Northumberland Fusiliers.
The start time for the attack was 3:30am on 3 August 1941. Preparations had started "during the middle of the night". There were sappers involved along with intelligence people to lay the start lines. One platoon moved forward at about 2:30am, followed by the rest after another 15 minutes. The moon had been out, but it set while the men were moving forward. About sixty guns commenced firing five minutes before the start time. That triggered fire from the enemy troops on the attackers. Most of the initial attackers were lost, with a few reached the top, but were almost all wounded. The sappers moved up and blew the wire with bangalore torpedoes. They had brought bridges which they placed across the anti-tank ditch. A few Australians made it to the post and killed four Germans and took six others prisoner. They were not able to fire the Very signal because the sack with it had been shot off.
They tried to send someone to tell Captain Conway, but they did not reach him. The attackers were in bad shape. A sapper arrived to help, but he found only about five men left who could still fight. The attack on Post S7 almost succeeded, but they lacked sufficient force and depending on Very lights for signalling did not work out well.
The attack on Post S6 did not go as well as the attack on S7. The attacking platoon got to the escarpment, but most of the platoon were lost to defensive fire. A supporting platoon took the weapons pits and sangers by the water tower. The engineers who were to blow the wire were all shot. The attacking platoon leader, Lieutenant Head, triggered a booby-trap and was wounded. Lt. Head now only had eight other men with him. There was little point in continuing the attack. Lt. Head took his man  back out of the area. Colonel Lloyd had been waiting for the signal that they attacks had succeeded. He didn't see them and concluded that the attacks had failed. So that had failed to take Post S6 and had retaken and then lost Post S7. This is based on the account in Vol.III of the Australian Official History.