Seen From The Air

[Prudie]

Any ideas what I saw from a flight - bit difficult to pinpoint but about 15 minutes before landing at Southampton, just north of a major road which I guess was the M4. Very green countryside with a lot of lakes/water (wondered Cotswold Water Park?) but satellite view doesn't show what I saw - a huge round stadium thing that looked like a giant golden polo mint - any locals with any idea?

[decmangan]

Don't tell anybody!

[Tuvok]

Where were you flying from?

If you go to Flight Radar 24 you can see the flight paths - so find a plane doing the same route that you took and see if that helps.

[Prudie]

Scrivens, you are brilliant. It must be the Diamond Light Source (never heard of it), it looked just like that. GCHQ was a good answer too but in far too built up an area.
Tuvok, I spend hours on Flightradar. It was a Flybe flight though and for some technical reason Flybe flight rarely show up. I even asked a question about it on here a year or two back, it was something about Flybe not using some transponder or something. Given the rickety Dash 8 I was on I'm not surprised they're not equipped with all the gadgets!!