This has been overflying my house for the last couple of hours.
A bit of investigative reveals that Bioflight are in the business of 'Aerial data Acquisition' - for which I read 'surveys'.
Anyone care to guess what they're surveying here?
Or are they simply taking advantage of the fact that there's close to zero air traffic currently over London.
ETA - I've guesstimated that so far, excluding the flight down from East Midlands Airport,
his air miles are approaching 500 - which is close to half of the aircraft's range capability.