Last year the Government published its General Aviation Strategy, which was aimed at growing the UK's £3 Billion per year general aviation industry. The strategy promised to boost planning policy protection to protect a network of general aviation airfields across the UK and thus boost economic growth.
However, there was a potential planning policy anomaly because previously developed land is generally regarded as being more appropriate for new development than "greenfield" land. This lead to speculation that getting planning permission to develop airfields for other uses would be easier than greenfield land. A parliamentary petition was raised to "Keep airfields greenfields". You can read and sign the petition here
The Government has issued a response to the petition that clarifies the status of airfields. In summary, the clarification makes it clear that the open spaces at airfields (i.e. runways, taxiways and other open land) should not be assumed to be suitable for redevelopment for other uses.