Demoiselles from Bushy Park. Always a challenge, but they will often only fly a short distance once disturbed. So it is possible to get a few goes at getting a good shot. I havent see beautiful demoiselles in the main park (as they prefer fast running water, whilst banded demoiselles prefer slower water) so assumed this was a male banded until I got home and looked at the image on the computer.
1. Female banded demoiselle
2. Male beautiful demoiselle
1. Female banded demoiselle
2. Male beautiful demoiselle