Mercedes trackside engineering director Andrew Shovlin has explained how the team prepares its drivers for situations like the one that decided the Spanish Grand Prix - including the use of secret codes that may have helped Kimi Antonelli make his Formula 1 race-winning pitstop.
After being alerted to the yellow flags for Lance Stroll's stopped Aston Martin, Antonelli backed off significantly through Turns 18 to 20, losing more time than the cars around him, including race leader Lando Norris and Max Verstappen directly behind.
