Three cornered flower stem and central ridge on leaf
No interactions present.
I have hopefully learned from my mistake this afternoon. Few flowers and the presence of bulbils suggest this species.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Interesting plant to come across and well established on a roadside hedgebank in North Worcestershire
Lat/Lng: 52.3902, -1.9153
OS grid ref: SP058769