As I understand things, flights BA8235 and BA8236 are scheduled flights between Cambridge and Gothenburg connecting AstraZeneca's HQ with a Swedish research centre. Although operated by Sun-Air using Dornier 328Jets in BA livery, tickets are not available to the public (although they used to be).
That's the preamble. What I've noticed recently (I live near the Cambridge flightpath) is a change to the schedules and on looking at fr24 I notice something which strikes me as odd:
https://www.flightradar24.com/data/aircraft/oy-ncn
After landing at Cambridge, the aircraft then goes to Manchester to overnight before returning in the morning. Why would they do that?
And is there really nothing they can do with the aircraft while it is in Sweden for five or so hours?
Could it be that AstraZeneca just want it on standby in case the CEO decides to come home early? Must cost a fortune...