Lin Gander, whilst waiting for me on Aberaeron north seafront, found a female eider very close to shore feeding avidly. I had the scope but not the right camera! The bird is a female with the white eyespot of a juv. No sign of the white borders to the speculum, and flanks patterned rather than barred. As they don't mature for 3 years its probably one of those intermediate plumages not in the book! Lin has a pic.