From link:
The Ministry of Defence will destroy all future UFO reports it receives so it does not have to make them public, a previously secret memo has revealed.
Pictures from recently released UFO files
Britain's official UFO investigation unit and hotline were closed down at the start of December.
Since then, reports of strange sights in the skies sent to the MoD have been kept for 30 days before being thrown out, the newly released policy document showed.
This stance was adopted so defence officials would not have to publish the information in response to freedom of information (FoI) requests or pass it to the National Archives.
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Gee, that's helpful.