"Bad news, Vernon," she said. "Mrs. Figg's broken her leg. She can't take him." She jerked her head in Harry's direction. Dudley's mouth fell open in horror, but Harry's heart gave a leap. Every year on Dudley's birthday, his parents took him and a friend out for the day, to adventure parks, hamburger restaurants, or the movies. Every year, Harry was left behind with Mrs. Figg, a mad old lady who lived two streets away. Harry hated it there. (Harry Potter and the Sorcerer's Stone)
What does ‘it’ imply?