The Deputy Prime Minister led the UK delegation to the Nuclear Security Summit in Seoul on 26-27 March. He reported significant achievements against our national commitments from the first summit in Washington in 2010, and made new commitments for the two years up to the next summit in the Netherlands in 2014.These commitments include further provision of financial and expert assistance for nuclear and radiological security improvements overseas, via our Global Threat Reduction Programme and working with the IAEA, the US, and other international partners; the use of our 2013 presidency of the Global Partnership against the Spread of Weapons of Mass Destruction to drive forward international co-operation on threat reduction programmes; continuing work through multinational fora such as the Global Initiative on Combating Nuclear Terrorism to support the international development of capabilities in nuclear forensics, detection and emergency response; and further work to assist the IAEA in international implementation of nuclear security education and training programmes.Domestically, the commitments include the further development of plans for the future management of our inventory of separated civil plutonium; and the further improvement of our civil nuclear security governance through a new Office for Nuclear Regulation.The Deputy Prime Minister also led a statement by 31 countries committing to specific action to improve the security of nuclear information. We will continue to lead and assist international efforts in this field.