The 4/4th Battalion was formed in June 1915 to train drafts for the two battalions already serving overseas and the 3/4th Bn preparing to go overseas in 58th Division. It was organised in three companies, A and B for the reception and training of recruits, and C (the 'Expeditionary Company') giving refresher training for wounded men returning to service. A number of former Guardsmen, City of London Police officers, and members of Enfield Rifle Club were appointed as instructors. The battalion took over 3/4th Bn's billets at Barnet in July 1915, with training carried out at Trent Park. When the Derby scheme superseded voluntary enlistment in February 1916, a large number of recruits were assigned directly to bring 3/4th Bn up to strength, but were put through the 4/4th Bn's training process.Grimwade, pp. 117–21.
