Baroness Goldie (Con)

My Lords, my Amendment 88 in this group is very much in a similar vein to my earlier amendments, although I see I do not have the presence of my newly acquired fan—the noble Lord, Lord Kerr of Kinlochard—to encourage me. I seek reassurance that the “unrestricted access, basing and overflight” provisions in Annex 1(1)(a) of the agreement includes the right of the UK to allow nuclear-propelled vessels and nuclear-armed vessels and aircraft to enter the sea and airspace of Diego Garcia. Although not in the amendment, the annexe of the treaty referred to also specifically covers the United States of America, and, for the avoidance of doubt, I include it in the confirmation I seek from the Secretary of State in this amendment. Again, I am asking that this be confirmed by the Secretary of State before the Bill can come into force. In this respect, I am perhaps baring my teeth more than my noble friend Lord Lilley, which is a rather unusual situation. As my noble friend Lord Lilley pointed out, Mauritius is a party to the Pelindaba treaty, which establishes the African continent as a nuclear-weapon-free zone. This prohibits the research, development, manufacture, stockpiling, acquisition, testing, possession, control or stationing of nuclear weapons in any signatory state. Article 7 of the Mauritius treaty states that both Mauritius and the United Kingdom confirm that no “existing international obligations or arrangements … conflict with the provisions of this Agreement, and that nothing in this Agreement shall affect the status of existing international obligations or arrangements except as expressly provided for in this Agreement”. Annex 1 of the treaty states that the United Kingdom retains “unrestricted ability to … control the … deployment of armed operations and lethal capabilities”. Nuclear weapons are lethal capabilities. So Britain and the United States must, as per the terms of the treaty, have an unrestricted ability, surely, to house nuclear weapons or to dock nuclear submarines at the base on Diego Garcia should we choose to do so. Yet that would appear to require an express provision in this treaty, and I cannot find it. Article 7(3) appears to seek to allay those concerns, but I would welcome an absolute clarification from the Minister. Will Mauritius’s membership of the Pelindaba treaty prevent us basing Vanguard-class submarines or, in the future, nuclear-armed aircraft, or the United States stationing any nuclear weapons at the base on Diego Garcia? That is a question that I require answered. This cannot be left in doubt—hence my requirement that the Secretary of State publish a statement to confirm the matters I have raised before this Bill comes into force, so that everyone is clear about what the UK and the US can or, perhaps more alarmingly, cannot do. As my noble friend Lord Lilley commented, although they are not directly covered by the Pelindaba treaty, my amendment also makes reference to nuclear-propelled vessels and, for the avoidance of doubt, I seek reassurance that Mauritius would not take exception to that. I look forward to the Minister’s response.