Great Knot Calidris tenuirostris
This the largest of the Calidrids is a very long-distance migrant moving between its breeding grounds in NE Siberia to its wintering grounds in SE Asia and Australia. Given the distances travelled it's not surprising it occasionally appears as a vagrant in western Europe, but records here are very few and far between. The blurry dot shown in the photos below was the first Norfolk record.
Great Knot, Breydon Water (Norfolk, UK), 14th July 2014