The Formula 1 world is busy racing in Singapore, but outside the paddock walls there are changes going on that could have an important effect on the future of the sport. The firm lost $1.8 billion in an investment in Australia’s Channel Nine and that has led to the resignation of the head of CVC’s Australian unit Adrian MacKenzie. He should not be confused with Donald MacKenzie, the man who oversees the F1 investment. However the company has cashed in a lot of its stake in F1, selling shares to various new investors in recent months. Now it is also selling off stakes in the firm with word that Singapore’s sovereign wealth fund GIC and the Kuwait Investment Authority (KIA) have taken a combined stake in the business. There is also talk of a private investor, based in Singapore. CVC is not commenting on the reports.