In a puddle which has now been present continuously for a number of years.
Edit: revised ID to Gerris.
No interactions present.
There are 8 species of UK pondskater and some are very similar indeed. I'm not sure you can go to species from the image available. A revised ID of just "Gerris" might be appropriate.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Lat/Lng: 55.4737, -3.2026
OS grid ref: NT240206