I assumed the leadership within the Commonwealth for the fight against apartheid. I was very much assisted by Brian Mulroney, the Prime Minister of Canada, [and] Rajiv Gandhi, when he became the Prime Minister of India. And there were trade sanctions.

As far as we're concerned, there was no sporting organisation [that] should have anything to do with the sport in South Africa.

I was used on a number of occasions by the United States and China as a conduit. For instance, I was up there talking with the Chinese leadership and they said to me that they were a bit concerned that the Americans had a misunderstanding about their relationship with the Soviets. There was some suggestion that there was a rapprochement developing between China and the Soviets, but nothing could have been further from the truth.

We [ with Brian Mulroney and Rajiv Gandhi] went to the meeting in Canada [the 1987 Vancouver CHOGM] and I said to them there that sanctions weren't working; they were just being busted. And it did seem to me that one way that we could bring the apartheid regime down would be if we did mount an effective investment sanction.

I rang my friend Jim Wolfensohn, who was then running a private commercial bank in New York. I said, "Come up to Vancouver", and he did. I put my proposition to him. He said, "I think it could work." I said, "Will you help us?" He said, "Yes." So, I set aside senior people in our treasury and they worked with Wolfensohn and the investment sanctions were applied. And that's what brought the regime down. The last South African Finance Minister, Barend du Plessis, went on record as saying that it was the investment sanctions that put the final nail in the coffin of apartheid.

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.

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.