This blackbird was spotted some distance north of Horsham, North Yorkshire. The UK bird societies can’t decide whether it is luecism or partial alibino-ism. There wer 3 or 4 blackbirds like this one. It was at the far reach of my Canon 55-250 lens, reviewed here, and through a window so not the best image. It has been ‘ringed’ by someone so it has been catalogued.