Certain trenches, D20 and 21 and Willow Walk, were much overlooked by High Command Redoubt, some 150 yards away.

The Germans throughout the 19th April heavily bombarded these trenches, and succeeded in seizing them at night.

One company 8th Bedfords and two companies Y.and L.delivered a counter-attack in the early hours of 20th April, but could not retake the position.

The Brigadier-General therefore decided to bombard them steadily throughout the 21st, and recapture them on the night 21st/22nd April with three companies of the K.S.L.I., then in Brigade Reserve.

This was brilliantly accomplished in spite of the very heavy going, and the line firmly re-established, but with the loss of Lt.-Col.