I don't know anything about UKC, so I'll only go from the AKC perspective. Firstly, you can't show a PAL registered dog in AKC conformation. Secondly, your dog, while not stacked properly, is most definitely not show quality; in fact, he has quite a number of glaring conformation faults. Mel is correct about his ears and topline. Also, his tail is set way too low and coat is not of good quality, just to name a couple of very obvious points. However, he is an absolutely adorable PET dog. My Maltese also has many conformation faults, but it doesn't detract from the precious, loving pet dog she is.