The UK conference considered confidence building, verification and compliance challenges associated with achieving further progress on nuclear disarmament and non-proliferation. The conference was the first time that senior policy-makers, military officials and technical experts from the five permanent members of the UN Security Council (P5) had met to discuss such issues. The P5 agreed that the conference would be held behind closed doors to facilitate full and frank discussion. The P5 issued a statement summarising the discussions after the conference.