Lizzie - where did I belittle you? I did nothing but point out that you were wrong. Which is not belittling someone. It is what people do when involved in serious discussions and should it be proven that I was wrong I hope I would be grown up enough to accept it without rancour or cause to develop any conspiricy theories.

Let us go back to the shop assistant analogy again. I know very little outside the narrow fields of music and high availability computing. If I want to buy something I ask a shop assistant. If I want to be educated I ask a teacher. If I want to avice on health matters I ask a doctor.

I am 100% sure that you are a wonderful shop assistant and that shop keeping is indeed a noble profession. Was it Napoleon that called us a nation of shopkeepers? He meant it as in insult but it made everyone proud to be British - rightly so! Anyhow, I would ask your advice and believe it wholeheartedly, on any concern I had over the fitnes of purpose or merchantable quality of my purchses. But you must excuse me if I take not the slightest bit of notice if you offer unsolicited advice on matters as important as childrens health and education.

Crazy though I may be I would rather trust the professionals. Oh, and those plumbers and builders that you mentioned that cannot read or write? Rememeber? I would not trust one of those to know the vital life-saving safety regulations on the latest gas or electrical equipment. If you chose to risk it then that is entirely up to you.

Good luck.

Dave