Its a bit of a naff photo but from what i saw i think its a greylag goose
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All greylag in the UK at this time of year are either feral or otherwise introduced. As for freedom from domesticated genes, that is almost impossible to tell in geese that are free from obvious domestic colouration.
It might be a greylag although the balance of probability says that it contains domestic genes too.
Lat/Lng: 51.4, 0.6
OS grid ref: TQ8478