I mean Buckingham Palace has never hired a professional public relations outfit let alone a Madison Avenue type and they would throw up their hands in horror at the very idea.

Charles was very intent to use his years as Prince of Wales to make his mark while he still had freedom of maneuver that he wouldn't have as King. The first subject he really went for was architecture. It made an impact.

The architect, Peter Arens who is the monstrous carbuncle architect, not merely did his design which had won a public competition never get built but his practice suffered financially for some years.

You do now have one in three people, as shown by the famous Carlton Monarchy debate poll, saying they want to get rid of the Monarchy. That was unthinkable even three, four years ago.

What was funny if you were there is that we were all immensely sophisticated people who knew exactly what she was going to say and we're chatting away, nice to see you.

I decided he'd changed so much that a whole new book was required and that book actually I can say so was the first to say that the marriage was in trouble and the Prince didn't like at all and my book was being serialized in the Sunday Times over five weeks.

It's a problem for him because he's got - like Edward VII had - nearly all his lifetime to wait until he becomes Monarch. What is he going to do with it? So he wants to do something positive but he always courts those dangers.

I remember a moment when the Prince went back to his old school, Grammar School in Melbourne, and slightly to his horror his old music teacher produced a cello.

Well the wedding in the words of the Archbishop of Canterbury was a fairy tale and there was a huge public impress, investment of goodwill, affection and indeed money in this Institution. It was a huge success at the time.