Britain's Queen Elizabeth II (2nd R) and the Duke of Edinburgh (L) pose for a photograph with Singapore's President Tony Tan Keng Yam (R) and his wife Mary (2nd L), before a State Banquet at Buckingham Palace in London on 21 October, 2014. Singapore's President Tony Tan Keng Yam began the first full day of engagements in the first state visit by a Singaporean president to Britain. AFP PHOTO / JUSTIN TALLIS / POOL        (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)