The rest of the division made several efforts to reinforce Frost's men, but were unable to break through the German forces that surrounded the bridge. The exact disposition of the British troops subsequently became more confused as the battle developed into house to house fighting. Tatham-Warter took command of 2nd Battalion on Tuesday 19, and Grayburn temporarily took command of A Company after Tatham-Warter's designated replacement was wounded. Grayburn led several fighting patrols that forced the Germans to commit more armour but as Wednesday 20 dawned, the British position was becoming untenable. As the Germans squeezed the perimeter they laid explosives on a section of the ramp crossing a road next to the riverbank, lest XXX Corps should break through and capture the bridge from the south. Grayburn led another patrol that forced the enemy away from the arch while Royal Engineers removed the fuzes. Grayburn was wounded again but quickly returned after being treated, now with his head bandaged and arm in a sling. German infantry later returned to relay the charges and a second patrol went out to remove them. A German tank had come forward to cover the arch, but in order to direct his men to better positions Grayburn stood up in full view of it. The tank's machine gun killed him instantly.