This is the most time consuming offline trophy within the game. To unlock this, you must win with Betfred World Championship EIGHT TIMES.
I won all ranked tournaments within the first few seasons to unlock the other trophy for winning the most, and then skipped all others, only playing the Betfred World Championship for the next five or so seasons.
If you win all eight World Championships consecutively, it will unlock at the end of the 2026/27 season.