(a) First four waves will pass over X line and lie down close in rear of the barrage, which will halt till zero + 1 hour and 10 minutes at X + 200 yards.
Fifth and sixth waves will clear up X line.
Seventh and eighth waves will clear up X line and lie down in rear of fourth wave.
Ninth wave will lie down short of X line.
(b) At zero + 2 hours all waves will advance to the Y line. Seventh and eighth waves will advance in front of fifth and sixth waves. Ninth wave will be in rear as before.
(c) On reaching Y line, first four waves will pass over Y line and lie down close in rear of barrage as before.
Seventh and eighth waves will clear up Y line.
Fifth and sixth waves will pass over Y line and lie down in rear of fourth wave.
Ninth wave will lie down short of Y line.
(d) Half an hour after reaching Y line all Commanding Officers will meet at Battalion Headquarters of 3rd Bn. Grenadier Guards, and will confer on attack on Z line.