From 19–20 September, the pioneer battalion 1/5th Cheshire Regiment dug Gropi Trench, a connexion between Beef Trench and Middle Copse covered by the London Scottish who captured several German troops of II Battalion, Reserve Infantry Regiment 235, extended two trenches to the light railway and linked the copse to the Quadrilateral, which made a jumping-off line 900 yards long facing Combles and Bouleaux Wood.