Don't be confused, Jean Francois is correct.
EBW, though a pic with a yellow cast - slightly corrected attached.
B
Chiffchaff IMO:
- green cast to the coverts (still showing after the colour balance was tweaked)
- lack of obvious whiteish fringes to the coverts and tertials
- broken eye-ring as Ken said
- extensive dark smudge to the lores possible in EBW but still...
- dirty underparts with a touch of yellow still visible to the undertail coverts even with the new image.
- the distance between the tip of P1 and the emargination of P3 is probably too short for an EBW.
- primary projection is on the short side for Bonelli’s too.