Brambling
Fringilla montifringilla

A common winter visitor to Britain, but a rare breeder here. They can often be seen with Chaffinches at feeders. The first two photos are females and the last are males in winter plumage.
 

  

  

1-3: Moor Green Lakes Nature Reserve, Berkshire 06/03/2006.
4: Lavell's Lake, Dinton Pastures, 06/04/2006.