In turn both resident squadrons were then replaced at Scampton by 57 Squadron (57 Squadron). The first departure was that of 83 Squadron which left in August 1942, transferring to RAF Wyton in order to become part of the fledgling Pathfinder Force. This departure resulted in 83 CF moving to RAF Wigsley where it was disbanded into 1654 Heavy Conversion Unit. On 2 January 1943, 49 Squadron departed for RAF Fiskerton with 49 CU disbanding, subsequently becoming 'C' Flight of 1661 Heavy Conversion Unit at RAF Waddington. By early January 1943 this left 57 Squadron as the sole occupier of the base.