Siberian Chiffchaff?, Abingdon SF 12th Feb

The tristis/abietinus bird was still present the sewage works today. I didn't hear it call but the pics below give an impression of how it variously appeared in the field. Generally grey-brown lacking any green/yellow except for yellow underwing covs/axillaries and greenish fringes to the remiges, tail and greater coverts. Neat super, dark bill and legs, nice wingbar and a light brown wash to the ear coverts.