I've got a potty situation... what would you do?

My daughter is 2.5 and she's a stubborn little cabbage - she is still in nappies (I'm British, sorry) which I understand is not at all unusual for her age and it wouldn't be a problem except she gets the most awful chronic nappy rash. Nothing seems to fix it - we've seen the GP multiple times, had antibiotic ointment, different nappy brands, it's not thrush, she has plenty of naked time - but it just won't go away. And it's really bad, constantly infected or on the verge on infection. The only thing that's going to help at this point is not wearing nappies.So I read 'Oh Crap potty training' way back when she was about one and thought 'Great, we'll do that!'. My daughter has other ideas. She has shown every sign of being ready: tells us when she has a wet or dirty nappy, very interested in everything to do with using the toilet, plays pretend with her toys on the potty, can sing the ABC song (as mentioned in the book as a sign of readiness!). She has pretty good language and can explain the hows and whys of using the potty or the toilet and she LOVES potty themed books. She is beginning to really hate nappies and complains loudly and fights me whenever I put one on her (we use cloth nappies so I guess it feels pretty wet and nasty). But will she use the potty? Of course not.Here's the major problem - this kid can hold it for HOURS. The Oh Crap method is out the window because she will hold her pee for 6 - 8 hours without batting an eyelid or appearing even slightly uncomfortable. I've even known her hold it for twelve. This is with a generous intake of water, juice, soup etc. Obviously this is not a healthy thing for her to be doing! She will simply wait until I put a nappy on her for sleep or a nap and go then. If cajoled she will sit on the potty for quite some time but won't do a thing. When I ask her why she won't use it her standard response is "the potty is very boring".I have tried: - role playing with her toys and talking about how they might be feeling - making the potty less boring: decorating it with stickers, singing special potty songs, reading books. - a sticker chart - bribery with various things - aspirational knickers: she picked them out and they are hanging up on a shelf above her bed where she can see them. She loves them! Just not enough to use the potty... - a toilet seat instead of the potty - giving her some privacy - completely putting it away for a few weeks and not mentioning it to give her a break from potty nagging!What am I missing? Has anyone else dealt with this? As I say, I would leave her alone until she makes the decision for herself but her poor little bum is in a dreadful state and only getting worse.Thank you everyone in advance for your advice! via /r/Parenting http://ift.tt/2z9di72