The British postponed their attack to 8 August, reduced the depth of the objective and made six "Chinese" attacks on 7 August, to inflict losses and mislead the defenders. The attack differed little from previous attempts, although careful briefings were conducted and elaborate measures taken to maintain communication, using contact-patrol aircraft to observe ground flares, mirrors, lamps and panels. Visual signalling posts and relay posts for runners were prepared and messenger-pigeons taken forward. Infantry wore shiny tin discs on the back of their equipment, to be visible from the air and a wireless station was set up near Favière Wood. Visual signalling still failed again during the attack, due to mist, dust and smoke. Congestion in the British trenches in front of Trônes Wood made a fresh attack impossible until next day. On 9 August, some battalions had not arrived by zero hour, the attacks failed and British troops isolated in Guillemont were overwhelmed and captured.