In November 2009 the Ministry of Defense puts a halt to it's UFO investigations for future generations but all hope is not lost. You can download the 4,300 pages from the national archive website from the time span of 2007 - 2009. The Government shut down the project because it had"no defence purpose" and were taking staff away from "more valuable defence-related activities," according to 25 files from the National Archives. You can download the files here.
Supposedly there was a surge of UFO sitings towards the end of the project that the MOD accredited a majority to the growing popularity of paper lanterns for celebratory purposes.