Blurry as it wouldn't keep still and never got a chance to focus.
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I can't really see how anyone could agree with this picture!
I'm not doubting the sighting, but even the clearest pictures of warblers provoke lengthy discussion, sometimes, let alone this one! I'm not even sure I could say this was a warbler...
My Flickr photos...
But it was a chiffchaff and it was making quite a din.
Lat/Lng: 51.7, -2.8
OS grid ref: SO4510