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From the picture I am not sure I can agree with yellow-legged.
The legs are pink-ish (although that is not absolutely reliable).
A very clean head (which in winter plumage would hint towards yellow-legged but this bird might just be slow in getting into its winter suit)
From what I can see of the red spot on the bill it is quite large which might again suggest yellow-legged but this is not really shown well enough to be confident.
Mantle colour is pretty much impossible to judge from a picture unless a bird for comparison is shown.
If you include any field notes taken saying how the bird was identified it might be possible to agree.
One has been frequenting this locaion for some years. Also I observed it a short time before, at a greater distance but legs showed yellow quite appreciably.
Lat/Lng: 50.679, -2.0412
OS grid ref: SY971865