Dipping its abdomen very deeply. The second picture shows the same dragonfly, with damselflies passing by.
No interactions present.
I believe Norfolk Hawkers are now breeding at Paxton Pits - we had one stray into Bedfordshire this year. Have you spotted any?
But I think they're over and done with for this year.
They were pretty elusive; I went looking for them four times, saw them twice, and only got one rather poor photograph. Oh well, there's always next year!
Lat/Lng: 52.2477, -0.24862
OS grid ref: TL196625