Although seemingly less prone to vagrancy overall, this is by far the more common of the species pair in Western Europe. It is probable that
there is always at least one somewhere in the UK during most winters, they may remain undetected in flocks. There is obviously a western bias to records, and they are also annual on Shetland.
Strangely, I have photographed few, even in the States, and appear to have only one in non-breeding plumage, taken on slide film in Argentina.
