Please see attached images/video.Small brown/rusty colour bird, around the size of a Robin or Sparrow. Top of tail completely white, extending up its back about half way.Was seen ground feeding then flew up on fence post.Sorry for the poor quality images, they were taken on a phone through an upstairs window in a hurry.
Video on youtube:
https://www.youtube.com/watch?v=93817odWAb0
2013 photos & vids here
eff37 on Flickr
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Regards, Hazel
We have the occasional chaffinch visit the garden too, and looking at images of leucistic chaffinches, it could possibly be one of those?(Image below not mine, taken from the web). The white seems to go halfway up its back like the bird I saw.