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It is not a melanistic bird, as suggested, it just has the flank feathers puffed up over the wing, if you look closely. In the second picture, you can see that the white fringes to the coverts..etc. are there.
My Flickr photos...
I agree with Ophrys re this being a normal male bird
Lat/Lng: 50.7, -1.0
OS grid ref: SZ7398