What is the Queens eldest son and going down?

The Queen's eldest son is Charles, Prince of Wales, who became King Charles III following the death of Queen Elizabeth II in September 2022. He is the heir apparent to the British throne, with his eldest son, Prince William, Duke of Cambridge, next in line after him. Following Prince William are his children, Prince George, Princess Charlotte, and Prince Louis. The line of succession continues with Prince Harry, Duke of Sussex, and his children, Archie and Lilibet.