What breed of Duck am I sunshine?

Down the Doctor's Pond in Dunmow to see how the ducks and geese are getting on. There were a variety of birds on and around the pond. I think the blip may be a Perkins or Aylesbury duck. A Perkins duck is characterized by a yellow bill, creamy white plumage, with orange shanks and toes and have an upright carriage and a peculiarly upturned rump - seems to fit the bill (no pun intended) for a Perkins duck.