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of Mallard crosses, since most domestic ducks are descended from this species. If you google "manky mallards", "heinz mallards", or "mallard hybrids", you'll find lots of pictures.
I don't think that they're actually true hybrids, because genetically they are all mallards by the strict definition.
Lat/Lng: 52.3, -7.8
OS grid ref: SL1087