Just been through the latest batch of declassified MoD documents released on the National Archives website (came out 31st October, which is a weird date to release this stuff). There are about 200 pages of files from 1996-2001 covering reports from RAF stations, mostly around the Cotswolds and East Anglia.
Most of it is heavily redacted (classic government bollocks) but there's enough legible to note a pattern: most sightings clustered around the autumn/winter period, particularly between September and February. The docs use phrases like "non-conventional aircraft" and "unidentified phenomena requiring further investigation."
No smoking gun, but the timing of releasing this ON Halloween feels deliberate. Bury it in the spooky season when people are distracted. Has anyone else noticed the pattern in the dates? And why are there zero sightings logged between May and August?