Red Bull sacked Christian Horner, who was Formula One's longest-serving active team principal and one of the most successful of all time, and replaced him on Wednesday with Racing Bulls' Laurent Mekies.

From Red Bull’s humble beginnings to Formula 1 dominance, Christian Horner was at the heart of it all.

Red Bull’s performance has slumped this year after the departure of designer and engineer Adrian Newey, a key figure in the team’s success.