Me again...with PROGRESS!
After our shocking few days of accidents, I explained to DD "when you feel wees and poos in your tummy you have to run to the toilet". I then started saying "mummy can feel a wee in her tummy, quick I have to go to the toilet" and ran to the toilet saying, quick, quick, quick. That seemed to be a vital piece of info for DD, because she then started saying "quick, quick" when she needed to go, and from there I could prompt her to run to the toilet. She finds it fun too, because we laugh and run through the house etc.
It has meant though we havent had an accident in days. She is also waking dry overnight and from her naps, so I have stopped using nappies in the day at all (I sneak one on her overnight, but 50% of the time she wakes up and takes it off and then uses the potty in the morning).
Its such an ebb and flow process...so anyone struggling. HANG IN THERE!