Sorry for the terrible photo! Taken with my phone at full zoom, then put the contrast on full to try and get any colours, but no joy.
it was hopping around in the foliage at the top of a small tree on urban wasteland and singing; song similar to a Black Redstart but without the scratchy bits. I caught several flashes of white on a dark body, but the song definitely wasn‘t a pied flycatcher. Slightly smaller than a sparrow, and thinner; beak definitely insect eater. Any suggestions?
Post edited at 17:40