Prince Philip, Duke of Edinburgh and Queen Elizabeth II arrive for a dinner service with members of the maritime organisations at Trinity House on June 20, 2011 in London, England.

Queen Elizabeth II signs the visitor's book at Trinity House on June 20, 2011 in London. The Corporation of Trinity House is one of the country's oldest maritime organisations having been formed under a Royal Charter given Henry VIII in 1514. The Duke of Edinburgh was elected as the Master of Trinity House in 1969.