Up late and a few cups of tea later, I ventured out in to a Norfolk that was -15oC.....
Rock Pipit on the salt marsh
Eventually, just before reaching the point of Brass Monkey, the Northern Harrier appeared and duly showed for the next hours or so (photo from Graham Etherington's blog).
Am I convinced Northern Harrier is a separate species for the European Hen Harrier - Yes.
Am I convinced this and the Irish bird are Northern Harriers - in all honesty, no. But what do I know?