UK Military bases Drone activity

Over the last week or so numerous USA based UK military bases have reported seeing drones flying over head. It has been stated by officials that they are not consumer drones and are in groups operating in an organised fashion.

Still to discover if this is regarding global wars, middle east or Russia - or something else.

https://www.airandspaceforces.com/more-drones-over-usaf-bases-uk-fairford-lakenheath/

https://www.lbc.co.uk/news/unidentified-drones-seen-over-us-military-bases-in-uk-as-sinister-sightings-cont/

https://www.bbc.co.uk/news/articles/cg7gxg3npxlo