When the need for training on piston-engined planes reduced, it was converted to a barracks in 1975, which in turn closed in 1999. The site was then leased to the Home Office and was converted into Oakington Immigration Reception Centre, an immigration detention centre.
As the need for training on piston-engined aircraft diminished, the facility was repurposed as a barracks in 1975, only to be shut down in 1999.  The site was then leased to the Home Office and transformed into an immigration detention center.