 This could accommodate a large body of troops accommodated in tents; it continued to be used for large-scale parades and assemblies of troops prior to embarkation during the First World War.To supplement the soldiers' accommodation in the casemates of the Redoubt, construction was begun in October 1804 on a separate barracks (later known as Grand Shaft Barracks), designed by Twiss to accommodate 700 men, on land between the Redoubt and the cliff to the south.Towards the cliff, the ground was levelled to create a parade ground; behind it, stepped terraces were created in the slope up the hill on which were built three parallel ranges of three- and four-storey barracks blocks