Here are a couple of pics of a bird I saw that is mooted as a probable Ring-neck/Tufted hybrid. Seen a few weeks ago in central Ireland. Apologies for the rubbish pics. I took them so feel free to rubbish them
They're over-exposed. The spur wasn't so clear in scope views.
Somebody will have better pics but these may help to partly answer your question. Along with the observations above of course. I posted them in another forum on BF before.