The “Wagatha Christie” trial kicks off today in the High Court, with Rebekah Vardy suing Coleen Rooney for libel. Rooney has accused Vardy of leaking her private Instagram posts to the press after using a cunning ruse to reveal Vardy as the prime suspect. Vardy has denied it.

Many readers won’t have the slightest idea what it’s all about. But with the libel case set to dominate headlines for the next week, here’s what you need to know.