Three images of what I initially thought to be Canada Goose/Greater White-fronted Goose Hybrid. This lone goose was found swimming amongst a large flock of Canada Geese. There seemed to be one Canada goose, possibly its mate, swimming near or alongside the Hybrid most of the time.
NOTE added: It was suggested to me by Chris B. that this is probably a cross between a Canada and a Graylag Goose( a.k.a Domestic Goose) On further checking, I believe that Chris is right. Thanks Chris.
Top Image: Full wing-stretch. Note the pink beak and the white primary outer feathers of the wings. There are nine white primaries on the left wing and three on the right wing.
Start of a wing-stretch. Note also the upturned tail.
Canada Goose (rear) and Hybrid (front)swimming in tandem. Note that the hybrid appears to be somewhat larger. Also note; the white primary wing feathers; the larger white facial patch and the pink vs black beak of the Hybrid.