The company was at work in the line as soon as it arrived, suffering casualties at Messines Ridge and at Hill 60, where it assisted in the mining operations preceding its capture on 17 April. 5th Division was then engaged during the German offensives (the Second Battle of Ypres) including the battles of Gravenstafel Ridge (23 April) and St Julien (24 April – 1 May). The division was not involved in any major actions for the next year, but suffered a steady trickle of casualties as it held the line in the Ypres sector from May to July, around Bray from August 1915 to February 1916, and the Arras front from March to July 1916.