Thank for the advice girls, I do do that anyway. I sit them both on potty at same time. They both just seem stuck on the releasing part. They will tell me when they HAVE done one. But even if I can see they need to go and sit them on the potty (jess last week was dancing due to doing poo, we sat her on and she did a tiny bit, but wouldn't do any more till we put her nappy on), they won't do anything till they have their nappies on again or knickers on. Pretty much as soon as we take them off the potty they seem to go. I'm not going to stress. It'd just be nice to have two nappy less kids when number 3 comes along....