From the overall shape and darkness in the outer primaries, I agree with the original poster that this is a Little Tern.
The dark bill and black nape are features of non-breeding plumage. Here’s a shot (taken 9th May 2022) which shows the shape from a similar angle, but this bird is in breeding plumage
[ Last edited by John Holmes at 16/05/2022 14:07 ]
Attachment
-
220509_boat_J_A6390-01.jpg
(72.03 KB)
-
16/05/2022 14:07