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I read somewhere that there was a massive increase in number of Siskins in gardens due to lack of seeds in the trees this year. It has certainly been the case in my garden!
My Flickr photos...
Actually, that might be an old link...it's not the one I thought I was looking for!
They usually peak in gardens at this time of year, but currently there are unusual numbers. My mum even has some in her garden in the very NW corner of Scotland, where scarcely a tree grows, and they are very unusual there.
Lat/Lng: 52.061168, 1.159024
OS grid ref: TM166450
In my garden.