Black Terns. Breeding in Sussex during the second worts war. Archive article from the British birds journal.

https://britishbirds.co.uk/sites/default/files/pdf-store/V39_N03_P071_072_A013.pdf

Article from the British Birds Journal 1946/1947. There are records during the 1970’s that very occasionally, Black Terns did nest/breed on the Ouse Washes.