Please could you tell me what these ducks are?

I believe abandoned pet ducks don't think native I'll run through a identifier and check if their not native I would say it's best to contact a waterfowl community to get them to rescue

I ran it through a bird identifier it says 2 are ancona ducks the other is mixed or unidtenifies

Thousands of feral ducks about, mostly with a mix of mallard. If you see ducks which are unidentifiable in parks and on canals, there's a fairly good chance they're some of these.