They tend to be civil servants, often diplomats drawn from the Foreign Office, who may be very pleasant, intelligent people, but once they get inside the Palace they're riveted to the status quo and they lose track of public opinion in the real world.
The Princess's so-called 'time and space speech' at the end of '93 about a year after the formal separation, looking back on it it's called her retirement from public life but we've seen in fact it's nothing of the kind.
I think her friends were worried that the bulimia might come back, about some psychological slide, and she was given breathing space to some extent by the media as much as she ever has been.
I think the relation between the monarchy and the press is very much a two-way street.
I went on a long trip through South America with Prince Charles where I was the only journalist there - a couple of photographers but no other writers.
I've always said, since I got to know him and wrote about him, that he's the generation he least appeals to is his own and I think in many ways he was born middle-aged and that's become apparent in recent years.
If you have an anecdote from one source, you file it away. If you hear it again, it may be true. Then the more times you hear it the less likely it is to be true.
It was delightful but, of course, it was pretty insulting to my professional reputation.
That was par for the course but I also found that commissions were being canceled and in fact I considered this directly libelous - I write biographies for a living as well as being a journalist - for a non fiction book to be called fiction from beginning to end.
Not merely can people like me write things that would never have been printed before but I think an enormously dramatic change has taken place in public opinion, possibly for the wrong reasons.
Thatcher came under pressure from right wing backbenchers to shut up the Prince of Wales and there was a deal done between them where he did actually shut up in the end.
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.
I personally felt that his ad hominen attacks on British architects were not the sort of thing a Prince of Wales should be doing because, apart from anything else, they put various people out of business.
Well I'm a very similar age to Prince Charles. I'm a year older than him. I was at university at the same time as him. I think in the sixties, like all the Royals, he really had very little impact on my life at all and he seemed, if anything a lot older in his attitudes.