"nightjar" wrote in message
...
On 17/04/2021 20:41, Harry Bloomfield wrote:
It must have done at my count 40 very tight circles, before I got bored
watching. It had landing lights on, around 10 miles from the airport and
had white lights flashing on wing tips.

Visibility strobes.

I couldn't see any navigation lights.

Not necessarily on during daylight.

What might that have been doing?

Waiting at a holding point for permission to join the landing circuit.

If it was that you'd expect that he would have seen
that before and they don't do that in very tight circles.