 Renumbered as No.99 (Depot Training) Squadron RFC the squadron moved to RFCS Harpswell, Lincolnshire in 1918, as a night bomber training unit, where it was disbanded on 13 June 1919.The squadron reformed at RAF Blyton on 7 November 1942 equipped with the Vickers Wellington, after a few months the squadron moved to RAF Lakenheath and was re-equipped with the Short Stirling heavy-bomber.