51°28′53″N, 0°16′52″W · THE NATIONAL ARCHIVES · KEW, LONDON

UK's MoD UFO Desk — closed for good, files all here.

The Ministry of Defence's UFO desk and its public hotline ran from 1950 to 2009. On closure the surviving files — 52,000+ pages across the AIR, DEFE and PREM record groups — were transferred to The National Archives at Kew in successive tranches between 2008 and 2017. All are digitised and free to view via Discovery. Reusable under the Open Government Licence v3. Source: TNA UFO Reports.

Active
1950–2009 — 59 years of MoD investigations and a public hotline.
Pages released
52 000+
All digitised, all free to download.
Closure
2009
UFO desk & hotline shut down — files transferred to Kew.
Final tranche
24 files · 6,000 pages covering 1994–2000.
Flagship case
Rendlesham Forest (Dec 1980) — the 'British Roswell'.
License
Open Government Licence v3 — reusable, attributable.

Every DEFE / AIR / PREM file with a UFO bearing.

Hand-picked highlights from TNA's UFO topic page plus deep-links into Discovery for the full collection. The press release PDF below is local; everything else loads on Discovery itself.