To ask the Prime Minister if a member of his foreign affairs staff attended the seminar on the detection and recognition of underground nuclear explosions held at the Geological Society, London, on 14 February; and if he will make a statement.

Yes, along with experts from the Ministry of Defence seismological centre at Blacknest. We welcome opportunities for constructive discussion of these issues. The United Kingdom has, therefore, been participating actively in related work in the conference on disarmament in Geneva.