By sacking Christian Horner, Red Bull has made a big change to try to return to F1 winning ways. But there are other steps it must take, too

Steve Nielsen has been unveiled as Alpine's new managing director - a role designed to take over Oakes' former duties. But the absence of a 'team principal' title, and the fact Nielsen has never previously led an F1 team, has sparked rumours about Christian Horner being lined up for the top job.