We have a garden in south London and today we had two of these on our runner bean canes. They seemed somewhat forbidding but kept to themselves, basking in the sunlight and flying to and fro for about 30 minutes.
Looking at various pictures it does not seem to be a European hornet. If it isn't, what is it?
Thank you for any help
I'm pretty certain it's a dragonfly, most probably a female Broad-bodied Chaser: