Several UFOs were sighted near RAF Boulmer by a fighter pilot and other personnel in July 1977, according to the article:
Quote from the article:
“So sensitive was the sighting that all records of it were hidden from public gaze and have only just been released under the Freedom of Information Act (FOI). It was stored in the Ministry of Defence’s “possible extra-terrestrial contact” department, known only by the code name SF4. It is one of many sightings listed by the Government where credible witnesses, such as military staff, policemen and airline pilots, have reported UFOs.
The RAF Boulmer report was deemed so sensitive that instead of being released to the public 25 years later as normal a further three-year ban was imposed. It is only because of the FOI Act, which came into force on January 1, that the case was reviewed and the details declassified.”
The role of RAF Boulmer is air surveillance and control and also search and rescue.
Subterranea Britannica article:
“Site Name: RAF Boulmer ('EZS') GCI R3 ROTOR Radar Station & Control and Reporting Centre in the UK Air Surveillance and Control System”:
Wikipedia article: “RAF Boulmer”:
Type 84 Radar at RAF Boulmer on an R17 modulator building. The Type 84 Radar has now gone but the modulator building still stands, according to Subterranea Britannica (below photo).