Thought I better give an update. DD had a great day on Friday, went to childcare and did not have one accident. She did have a little one at home that night, but at least attempted to go to the toilet. Today she was quite good, DH put her in a nappy when we were out for a couple of hours, well it was barely used and when we got home she took it off herself to go to the potty. The rest of the day she has been going herself and with the odd prompting from us. She did get her fish today as promised by DH, so maybe that helped. Fingers crossed this improvement continues.