"No health and safety legislation can require that free water should be available at a discotheque" - that's absolutely rubbish, and the man must know it. There's absolutely no reason there couldn't be a legal requirement on any place which sells any drink at all to provide free water on request.
That's always been normal practice in any case, until these bastards who run some of these events got into the act.
Sending a sentence like that to an MP is a downright insult. And any minister who could write it, or even sign it, is clearly not up to a job in government at any level.