Seemed too orange for most likely varieties in the field guide.
No interactions present.
... because of sparsely bristled capsules, and we were in right occurrence area. Colour - which is very accurate in the picture - seemed a bit too orangey, that was my only doubt. Interesting that there were two other suggestions first. Petals and pods are wrong for common poppy.
I agree with long-headed, description updated.
Paul Seligman. Flickr: http://www.flickr.com/photos/paul_seligman_cardiff/collections/721576087...
Lat/Lng: 50.98475, -2.0751
OS grid ref: ST948205