Siberian Chiffchaff (Shalfleet/February)

On February 2nd I revisited the sewage farm at Shalfleet (SZ413888):

Other than the vocal Sibe chiff there were only a few other chiffs feeding round the perimeter; plus a vocal Cetti's (again), and grey wagtails etc. Steve Clemons had 14 Siskin there on Feb 10th. 

Throwback to January 19th 2016: a showy siberian chiffchaff at Roud sewage works;

And to 2018:

Gos