Identified by Chris Brooks, separated from previous post as it is a different species.
No interactions present.
Just a tip for the future, the tail segments contain some identifying features which could be useful.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Should have added that the rear of the medium lobe is also consistent with a Azure Damselfly.
I tried to get a better shot, but they were all pretty lively, and this was the best I could manage.
Sorry it wasn't a criticism, just a tip.
I was annoyed - but at myself for not getting a better shot, and at the little beasts for not being more cooperative!
Once again, thanks.
Lat/Lng: 52.4515, -0.1889
OS grid ref: TL231852