The President of the United Mexican States, Señor Enrique Peña Nieto, and Señora Angélica Rivera de Peña arrive at Buckingham Palace with The Queen and The Duke of Edinburgh at the start of the President's State Visit to the UK. Find out more about the significance of State Visits on: http://www.royal.gov.uk/MonarchUK/RoyalVisits/Inwardstatevisitssince1952.aspx