Always present on the rocks bordering the reservoir.
No interactions present.
The dark back and dusky flanks make this a Pied Wagtail (Motacilla alba subsp. yarrellii). You might want to add a revised ID.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
I meant to do this last night but got distrated by a bracket fungi I am trying to put a name to.
Lat/Lng: 52.32, -1.32
OS grid ref: SP464693
Large reservoir also used for sailing, fishing and with a reserve area and observation hide