Opened in 1938, when it replaced the old airfield at Fen Ditton,[4] the airport is owned and operated by Marshall Aerospace, a Cambridge-based company with many years' history servicing civilian and military contracts.[7] The following units were here at some point:[7] In 2000, a proposal was created to relocate the airport to a new site away from the city, which would have freed up 500 acres (200 ha) of land for the building of several thousand new homes.[29] Passenger services were reported as "to end on 31 January 2016",[30] although British Airways/Sun-Air continued temporarily to operate flights from Cambridge to Gothenburg.[32] In November 2019 the local FBO changed hands from ExecuJet to Cambridge Jet Centre which is managed by the Airport directly.[35] As of May 2019[update], the Group was deciding between three potential airfields for its continuing operations: Duxford and Wyton in Cambridgeshire, and Cranfield in Bedfordshire.