We were great mates [with Rajiv Gandhi]: very, very, very close friends. In fact, on my visit to India as Prime Minister, we were going to his home for dinner. There were two aspects I remember: one is him saying how he had trouble with his security people, because they insisted he wears a vest. He said it was very uncomfortable and he often took it off, but of course, in the end, it wouldn't have mattered if he'd been wearing three vests - he would have been gone.

It [also] lives on its history, now, to some extent: its achievements [ of the Commonwealth] in Rhodesia and South Africa, which were enormous. And they'll live on that for some time, I guess. And there is still - I'm out of touch with it now, of course - but I still think there is a degree of cooperation at the economic level, to some extent, with the more developed countries helping the less developed. How substantial that is now, I simply am not versed.

If you've got good chemistry at the top, it's an enormous help. It's easy to have good chemistry with some, not so easy with others. With [Robert Mugabe], for example.

In fact, soon after that [South African sanctions], I was going on an official visit to the UK and Margaret Thatcher instructed every minister to clear the decks of any outstanding matters between us - Australia and the Brits. And she went out of her way to make sure that that was as successful a visit as it possibly could be.

There is a reciprocal respect for [ Elizabeth II], for her interest in the Commonwealth. The members of the Commonwealth recognise that here is a genuine interest from the top. So, that's one reason. I'm not putting it necessarily in order of importance.

I don't know who described Mahathir [bin Mohamad] as a pillar of the Commonwealth, but they don't know what they're talking about.

I think there are a number of reasons, not least of which is the personality of the Queen [ Elizabeth II]. It's very easy to underrate her significance. I think she finds the Commonwealth and her position as Head of the Commonwealth infinitely more interesting than being the Queen of England, because she has no significant role in the latter.