What a fantastic bird!
Not admired by the Mute Swan?
Related to the shelduck, this pale brown and grey goose has distinctive dark brown eye-patches and contrasting white wing patches in flight. It was introduced as an ornamental wildfowl species and has escaped into the wild, now successfully breeding in a feral state. (text from RSPB website)
Worth a close look at DBCP. Not a common sight in Northumberland. It has no rings and showed it could fly by disappearing down to Druridge Pools for part of Thursday.
I am sure it will become a little less wary as it gets used to visitors but presently it heads back to the water as people approach it.