I wondered if this was a female black darter.
No interactions present.
Common Darter - http://www.dragonfly-images.co.uk/#/quick-id-cd/4532707348
Black Darter - http://www.dragonfly-images.co.uk/#/quick-id-bd/4532705655
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Thank you for the correct ID, comments and such a quick response.
Lat/Lng: 57.6, -3.7
OS grid ref: NJ0163