I agree and both disagree with Karlin.
Often I think you have to ride these things out and ignore the behaviuor as suggested so it does not become an attention seeking exercise but.............. If when you do take him to the loo he is going then I don't really agree with ignoring him as he obviously does need to go ?
If/when you do take him to the loo during the night I would have as little stimulation as possible, don't talk to him or look at him and try not to let him get excited. (easier said than done I know)
Harry (tri) and Digby (blen).