British Prime Minister Boris Johnson has paid a warm tribute to Prince Philip, husband of Queen Elizabeth, who passed away today, aged 99. Below is a text of his speech. "It was with great sadness that a short time ago I received word from Buckingham Palace that His Royal Highness the Duke of Edinburgh has passed away at the age of 99. "Prince Philip earned the affection of generations here in the United Kingdom, across the Commonwealth and around the world. "He was the longest serving consort in history, one of the last surviving people in this country to have…