No interactions present.
Cheeks look darkish and legs look darkish, so not an obvious Willow, but primary projection looks Willowy. What makes you certain?
My Flickr photos...
Pale diffuse frame to eye area rather than crisp eye ring, although I agree supercilium does not extend much behind eye. Most of Chiffchaff I've seen have very crisp eye ring.
Overall colouration not dark enough for me.
With small flock of tits and warblers with some willow warbler subsong, although I can't be certain it was from this bird.
Maybe I should amend to likely?
You're probably right, but not an obvious one, so not sure I can agree. I would not amend to likely...see what others think.
Ooops too late!
Lat/Lng: 54.5, -3.4
OS grid ref: NY1015