B+W passerine (1 Viewer)

bird in flight about 7 feet from me.

large dunnock size, very dark.

but TWO PARALEL white wing bars, whihc ran whole length of the wing.

seen low down in dense vegetaion on uni campus.

in jizz it didnt fit any common birds.

this is in york england.

I suspect a migrant, lot of wind damp weather this week......southerly winds.

Possibly a bird from africa/middle east.

I have 30yrs birding, so it stood out as different. sadly i was in a hurry to go somewhere and had no time to go back, for further analysis.

my gut feeling was black and white warbler, but the wing pattern is slightly off. i suspect a flycatcher of some sort?

wish id had more time to look at it, but wasin a hurry to get somewhere.(

Struggling to imagine this bird from the description, especially as you've mentioned B+W Warbler and flycatchers, which are very dissimilar. What shape was it? How did it fly? Anything else you can yell us about the plumage, and what it was about it that made it different to say, a Chaffinch?