After Christian Horner’s exit at Red Bull, what are the main questions facing the team and new boss Laurent Mekies

Red Bull’s Formula 1 team is changing team directors for the first time since it was founded 20 years ago, after Christian Horner's sacking sent shockwaves through the sport on Wednesday.

Horner oversaw eight F1 drivers’ titles — four for Sebastian Vettel and four for Max Verstappen — and six constructors’ titles during his time with the team.