Apparently, this stork is called Klio and recently escaped from the Deeping St James Exotic Pet Refuge. The tell-tale signs are the ring on the right leg, the deformed left foot, its extreme tameness and the fact that it is a Whtie Stork in Peterborough in March, at all.
The probably first-winter drake Scaup was found a couple of weeks ago by Josh Jones, who said to me at the time he wasn't sure if it was alone. Yesterday, I confirmed there was another present (what looks like a first-winter female to me). Initially, they seemed unaware of each other, each hanging out with its own group of Tufties; but eventually they started hanging out together, as here.