article_snippet: Genial: The couple had clearly enjoyed The couple visit and were all smiles as The couple made The couple farewells .
article_snippet: And The couple're off: The Queen and Prince Philip waved The couple guests off from the steps of Buckingham Palace .
article_snippet: On arrival, the couple were welcomed with a  Royal Salute fired from the cannons at the Tower of London during which a total of 62 shots were fired - the basic 21-gun Royal Salute, plus another 20 because the Tower is a royal palace and a further 21 for the City of London.
article_snippet: This evening, the couple will be formally bid farewell by Viscount Brookeborough, Lord-in-Waiting to the Queen before boarding a flight back to Mexico.