since 1 July, increasing demands for artillery observation, methodically to locate and register new German emplacements, for counter-battery fire. In the afternoon of 9 July, German supply dumps at Le Sars and an HQ at Le Transloy were bombed by 21 Squadron and Havrincourt Wood was attacked on 11 July by and On 13 July, the RFC attacked trains on the Douai–Cambrai and Valenciennes–Cambrai lines and managed to derail a train near Aubigny-au-Bac. The front due to be attacked on 14 July and the third position beyond were photographed and studied from low altitude, despite much small-arms fire from German troops. On the day, cloud cover came down to and ground haze limited visibility to . A 9 Squadron observer reported that the 3rd Division had overrun two trench lines and was in Bazentin le Grand and the 9th (Scottish) Division had been seen preparing to attack Waterlot Farm. Other observers saw enough infantry and flares through the mist to call up the cavalry and a ruse was attempted at when an observer sent a wireless message that the British had broken through and cavalry were pursuing German troops. At South African troops were seen running into Longueval and at were observed in the north end, the rest of the village being captured by an artillery observer saw that the 7th Division was beyond Bazentin le Petit and the division was ordered to attack High Wood, with the Secunderabad Cavalry on the right. The cavalry advanced at with the knowledge from earlier air observation, that little opposition was to be expected. A crew from 3 Squadron saw German parties hiding in crops and folds and flew low over them to divert their attention and warn the cavalry. The observer fired his Lewis gun at the Germans until the cavalry came up, then sketched the German dispositions and dropped it on the (troopers). The 7th Division flares were seen in High Wood at by a 3 Squadron observer. Next day, 9 Squadron watched German counter-attacks on Longueval and directed counter-battery fire, photographed the area and reported events. Fighter escorts from 22 Squadron found no German aircraft and attacked ground targets instead. German advances into Longueval endangered the troops in High Wood, at a 3 Squadron aircraft reconnoitred and the crew report led to the British troops being ordered out of the wood. Aftermath Analysis On 11 July, GHQ Intelligence had written