HC Deb 23 October 1986 vol 102 c974W
Mr. Deakins

asked the Secretary of State for Foreign and Commonwealth Affairs what priority he gives to the establishment of negative security assurances to nonnuclear weapon states, as a means of preventing the spread of nuclear weapons.

Mr. Renton

The United Kingdom and all other nuclear weapon states have given unilateral assurances to non-nuclear weapon states, but we continue to attach the highest importance to the non-proliferation treaty as the main defence against the spread of nuclear weapons.