Encounter Atlas
Why it matters
The most complete national UFO file release outside the US, and a running record of what Britons reported for half a century.
Official releases / GBUnited Kingdom
Ministry of Defence UFO files at The National Archives
From 2008 to 2013 the MoD transferred its UFO desk files to The National Archives in ten batches and they were put online free. They hold public sighting reports, letters, parliamentary questions, Rendlesham Forest papers and internal briefings, ending when the desk closed in 2009.