Bill length and amount of orange are not diagnostic features, as some male Tundras can have bills this length. Some Tundras can also show a slightly concave culmen, and some can look longer necked than others. So the onus is, I think, "prove it is not a Tundra", by far the commoner goose wintering in Holland and visiting Yorkshire.
Thw blown up photo in the hide seemd to exaggerate the size of the grinning patch, which I think is diagnostic, and one of the photos seemed to show a bit of a "step" between the culmen and the forehead.
From the photos here, the large size alongside Greylag, the obviously long neck, the
apparently longer narrower grinning patch, the reduced black on the nail, the flat chin, lacking the jowl often shown by Tundra, all point to Taiga, and then the amount of orange just tends support the ID