He has been 4 times now and wets himself every time he realises he has to go. He screams all the way there and has to be prised off me (I'm not allowed to go in with him). He spends all the time he is there sitting on a chair by himself watching the clock. He does chat to the other children if they approach him but will not move from his chair. He is only going for an hour and a half at the moment but is supposed to go for three hours. Can anyone give me some advice please?