I know wrens should be easily identifiable but someone told me this looks like some kind of warbler so I wanted to be sure
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I think it is a young one
Not a young one, as juveniles wrens are darker and have very loose feathers, in comparison. The very pale supercilium is that of an adult.
My Flickr photos...
Another thing I have learned
I've just noticed that there is a juvenile wren on the carousel which shows what I mean nicely. Two wrens before this one!
Lat/Lng: 51.4, -1.0
OS grid ref: SU7371