BU33's flight path from yesterday - strange….
The BAE146s spotted are part of the Queen's Flight. 32 Squadron RAF.
https://en.wikipedia.org/wiki/No._32_Squadron_RAF
On 1 April 1995, The Queen's Flight was merged into No. 32 Squadron RAF to become No. 32 (The Royal) Squadron. Its BAe 146s and two Westland Wessex HCC.4 helicopters moved from Benson to 32 Squadron's base at RAF Northolt. This ended the RAF's provision of dedicated VIP transport aircraft; the aircraft of 32 Squadron are only available to VIP passengers if not needed for military operations.
It's hard work but I'm getting there.
Flight data from the third plane.
2-XAVT's flight path until it dropped off ADS-B.