Mexico and the United Nations headquarters in New York City and to the other main UN agencies based in Geneva, Nairobi, Paris, Rome and Vienna. Mexico and the United Nations Mexico is one of the 51 founding members of the United Nations and was admitted into the organization in 1945. Since then, Mexico is a full member of all the UN agencies and participates actively within the organization and has diplomatic relations with most member states. On 26 June 1945, Mexico was represented in San Francisco by Ezequiel Padilla Peñaloza, Francisco Castillo Nájera and Manuel Tello Baurraud in the signing of the United Nations Charter.
United Kingdom and the United Nations peace operations and in UN headquarters. United Kingdom and the United Nations The United Kingdom of Great Britain and Northern Ireland is a founding member of the United Nations and one of five permanent members of the UN Security Council. As the fifth largest provider of financial contributions to the United Nations, the UK provided 5 percent of the UN budget in 2015, and 6.7 percent of the peacekeeping budget. British English is one of the six official languages of the United Nations, and the United Kingdom is home to the International Maritime Organization, whose head office is in London.