Rancid?

A fleeting lunchtime visit.  Fully-winged (always a positive thing for a bird) and unringed.  Shared the pond with Goosander, amongst other stuff,... mergansertastic.

  Two in the Azores, another in Iceland and one in Wiltshire,...

... it's an invasion!

Also saw a Grey Wagtail minus its tail today,... so, almost literally, a Grey Wag. 

[Addendum: turns out there have been two in Iceland this winter, another in the Faroes and one in Scotland.  This bird also moved on after six days, fed in a natural manner and wasn't ridiculously tame, e.g. the Lesser Scaup at Bryn Bach came just as close,...  half a chance of acceptance?]