In late December 1980, there was a series of unexplained lights near Rendlesham Forest, Suffolk, England which have become linked with claims of UFO landings. The events occurred just outside RAF Woodbridge, which was used at the time by the United States Air Force.
In December 2018, David Clarke, a British UFO researcher, reported a claim that the incident was a set-up by the SAS as a revenge plot on the USAF.
According to this story, in August 1980, the SAS parachuted into RAF Woodbridge to test the security at the nuclear site. The USAF had recently upgraded their radar and detected the black parachutes of the SAS men as they descended to the base. The SAS troops were interrogated and beaten up, with the ultimate insult that they were called "unidentified aliens".
To enact their revenge, the SAS "gave" the USAF their own version of an alien event; "....as December approached, lights and coloured flares were rigged in the woods. Black helium balloons were also coupled to remote-controlled kites to carry suspended materials into the sky, activated by radio-controls."
https://en.m.wikipedia.org/wiki/Rendlesham_Forest_incident