I agree with Andrew: second is an Common Eider.
But what is with the first picture? Is it the only one?
First "jizz look": hey, there is a bird that looks good for a Curlew SP among the Dunlins. It looks just larger, longer-legged (making the bird SEEMINGLY reach higher out of the water compared to the Dunlins). Yes, I know, all this cant be really judged in a single picture, but this is my gut feeling here. More, it has a really prominent, clear-cut supercilium, appearantly long wings crossing above the tail like scissors and with much wishfull thinking I see an evenly curved bill, good for Curlew SP.
Conclusion? More pictures please. They will with a high degree of certainty proof this is indeed a Curlew SP. If this is the only picture, I am not so sure. Then I would ID it as a propable Curlew SP and would not note it in my bird-diary-book.