Thanks Steve, I made the knot assumption based on this (borrowed) knot shot in which the bird is quite brown rather than grey and not a great difference in bill length other than maybe slightly less of a decurve.
Two images of same bird seen at Gyles Quay on Cooley peninsula early last June, dark longish bill and dark legs tell me Rock Pipit a.petrosus but not sure as book images are confusing!
Photo is from east coast of Ireland in June... My books are not great for gulls would point to two different cy great black-backed. Can you confirm or identify please.
Thanks
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