Bird Quiz

If anybody knows what these birds are, do please let me know! For the first time ever I have seen them on my feeder, which made such an exciting change after several years of great tits dominating small bird life in these parts.

Apologies for the poor picture quality but when I tried to open the window to get a clearer view they all flew away. So this is taken through the window and in less than optimum light conditions. Still, their colours and patterns are quite clear, so I hope someone will let me know, either in a comment here, or via e-mail what they are.