Two brigades of the 30th Division were to advance to the first objective, a line from Dublin Trench to Glatz Redoubt, in two stages by 8:28 a.m. The right-hand brigade was to stop at Casement Trench, which extended west from Dublin Redoubt and the brigade on the left was to reach Train Alley, 150 yards west of Glatz Redoubt and to attack the redoubt.