Wonder if this distinctive form would be split from Black Redstart.
I also made the pilgrimage to the Black-winged Kite. A long walk in to view a very distant perched bird. Still, only the 3rd or 4th for the UK and a country tick.
A good supporting cast around, including a small flock of the increasingly scarce Berwick's Swan, a couple each of Tundra Bean and Eurasian White-fronted Geese, and this first winter Iceland Gull. Another species that had become much scarcer in recent years.