I've attached a few photographs of the warbler present in the gully at South Gare today which hopefully might help with the i.d. Unfortunately I didn't hear it call whilst I was there.
Thanks,
Adam
Two more photographs
Final one
This is certainly an interesting bird!
As I've commented on MNS's pics, the mottled ear coverts are a pro y-b warbler feature, as is the well marked blackish base to the secondaries. The bare parts however look spot on for Hume's!
Has anyone heard the bird call?
Stew