With the recent news that Prince Philip is stepping away from public duties, Alan Titchmarsh looks back on the Duke's work and life to date. Alan Titchmarsh has interviewed Prince Philip on several occasions and was granted one of his last formal interviews, gaining a rare insight into the mind of the man who is known as a moderniser of the Royal family and is the longest serving consort in British history. Alan sees the Duke off duty post retirement at the Royal Windsor Horse Show, hears about the Duke from those closest to him, celebrates 70 years of the Prince's royal duty from naval officer to Queen's consort and looks ahead to what this significant moment means for the monarchy.