Edward saw the bird and called it fractionally before I did. Reflexes obviously slowing down. Probably the closest L-t Duck I've ever seen; lets hope it stays around.
After we split up I went to the estuary and on the ebb tide near the tern posts were 170 Dunlin, eight Golden and one Grey Plover and two Turnstones. Three Pintail were close inshore.
A quick look at the sea from the toilet block revealed four more Red-throated Divers.