I understand what my hon. Friend means. There is always the risk, with any international agreement, that at some point in the future one of the member states will decide that it wants to leave. I can think of a situation closer to home in which one of the parties to an international agreement wants to leave, but we will not go into that.
The Antarctic convention is, in many respects, a model of international co-operation. It is many decades since the signing of the original treaty, and over the ensuing decade the number of contracting parties, which
I think was initially 12, has grown considerably. More countries are now interested in protecting the Antarctic environment. I would hope that the cost-benefit analysis would be conducted in the right spirit, and that it would be a question not just of cost, but of the benefit to the world of continuing to protect Antarctica as it is protected at present.