Quite prepared to discover I'm completely wrong here.
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The shape of the anal appendages (inferior appendages are straight and narrow) help identify this species from rarer similar ones.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Another one "sorted".
Lat/Lng: 52.4515, -0.1889
OS grid ref: TL231852