Answer:
Pigs, widely present in world cultures, have taken on many meanings and been used for many purposes in traditional arts, popular culture, and media. As one scholar puts it, people all over the world have made swine stand for "extremes of human joy or fear, celebration, ridicule, and repulsion.
You just hit the biggest lottery of all time! An understatement would be: "I'm kind of excited."
Number 3 is tell I'll answer the others in a separate answer
It might be summarized that the poet believes that England brings hopes and glory. People is free. British people are proud of their nation. God protects the land and made the land powerful. God will make the nation even more stronger in the future.