A translator talks to Queen Elizabeth as they walk along the Great Wall of China. October 1986.

Queen Elizabeth II poses for photo with President Nixon and Prime Minister Edward Heath at Chequers

Queen Elizabeth and the Duke of Edinburgh at London Airport talk to the crew of the passenger aircraft that flew her back to London after the death of her father, King George VI. 1952.

Queen Elizabeth and Prince Philip admire the ancient tombs at the Valley of Emperors during their Royal visit to China. October 1986.

Queen Elizabeth II takes seat next to President Aleksander Kwasniewski as he applauds her speech during visit to Poland, Warsaw; 26 Mar 96

Queen Elizabeth greets guests at a dinner with the Japanese Prime Minister at the Imperial Palace in Tokyo, Japan.

The open topped carriage carrying the Queen and President De Gaulle moves down Whitehall, past cheering crowds and accompanied by mounted regiments of the Household Cavalry. 05 April 1960.

Queen, dressed in red, walks towards Hereford Cathedral to distribute Maundy Money; 15 Apr 76

Pope Benedict XVI prepare to give speech before Queen Elizabeth II at Palace of Holyroodhouse, her official residence in Scotland

Queen Elizabeth and Princess Margaret arrive at the Lyceum Theatre for a theatrical performance during the Edinburgh Festival. September 1950.

The Queen and the Duke of Edinburgh on horseback watch the Grenadier Guards march past Buckingham Palace during the Trooping the Colour ceremony. 1953.

Queen Elizabeth II in pink outfit holding bunch of white lilies, meets and greets enthusiastic crowds and receives painting from boy, Silver Jubilee; 07 June 77

Queen Elizabeth II salutes marching British Armed Forces.

Prince William and RAF officer await arrival of Queen Elizabeth II and the Duke of Edinburgh

Queen Elizabeth II accompanied by Duke of Edinburgh arrive in Rome and becomes first reigning British monarch to visit Vatican in 40 years, Vatican City; 1961

Mother Teresa receives Order of Merit from Queen Elizabeth II, Delhi; 1983

The Queen Elizabeth II luxury liner and other ships move along the water of Yokohama.

Queen Elizabeth II receives gifts from school children on her 85th birthday

The Queen and President Francois Mitterand of France taking scissors from ceremonial cushion, and cutting ribbon to inaugurate Channel Tunnel; opening of Channel Tunnel; 6 May 94

Men fastening large models of Tudor roses onto the exterior of a shop on Regent Street to celebrate the coronation of Elizabeth II. 1953.

Queen Elizabeth II wearing head scarf, horse riding with two grooms in countryside, England; Jun 94

Queen Elizabeth II leaves Buckingham Palace in state carriage flanked by cavalry and royal attendants, public crowds cheer enthusiastically, Silver Jubilee; 07 June 77

President Giani Zail Singh and entourage greet Queen Elizabeth II and Prince Philip descending from aircraft, New Delhi; Nov 83

President Jacques Chirac shakes hands and chats with Prime Minister John Major as Queen Elizabeth II looks on, Horseguards Parade, London; 14 May 96

The Queen arrives in Cardiff to visit the Welsh Assembley