Hemswell operated as a dual site with a nearby overflow airfield at RAF Ingham. RAF Ingham was a grassed field landing ground with few buildings or facilities. Between 1941 and 1943 the Polish bomber squadrons (No. 305 Polish Bomber Squadron, No. 301 Polish Bomber Squadron and No. 300 Polish Bomber Squadron) used the airfield for their Wellington operations. The squadrons used Ingham while training and also flew operations from there whilst the runways were being laid at Hemswell in anticipation of the arrival of the heavier Avro Lancaster. Ingham was later renamed RAF Cammeringham and became a full station in its own right, closing for aircraft use in 1945 when the grass runways became unstable and taking on a ground training role. Cliffe House, that had been commandeered as the officers' mess and a number of pre-fabricated buildings, quonset huts and the brick built control tower still stand at the abandoned airfield.