Appears to have more of a "dog-like" face rather than an arched nose of the grey seal.
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The photo is at the wrong angle to be absolutely sure of the forehead shape, it could be a young grey which tend not to have the same adult shaped forehead.
However, it is an excellent shot of the nostrils which have the distinctive 'V' shape of a common seal - the nostrils of a grey seal are parallel. Therefore, I'm confident in agreeing to your identification. Though both are found around the Farne Islands greys are by far the commonest species.
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Thats useful Graham
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