I had never seen this "form" of Fulmar before. After some research I discovered that they are very variable and you get birds at both ends of the scale; some look very much like "normal" Fulmars and others are far more darker as you go along the scale, like the bird below taken by Mark Newsome in County Durham:
(Blue Fulmar - © Mark Newsome)
Until next time, Foghorn out!
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