Overview

• FIA pre-round disclosures list Red Bull and McLaren as the only front-runners to declare floor-focused upgrades for Silverstone.
• Red Bull fitted a new floor mod on Max Verstappen’s RB21 in first practice and repositioned floor fences alongside re-profiled surfaces to optimise pressure distribution and add downforce without compromising flow stability.
• McLaren’s MCL39 features revised floor geometry and a redesigned rear brake duct inlet to enhance local airflow for improved aerodynamic efficiency and brake cooling.
• Aston Martin and Haas each introduced four underfloor and bodywork updates to boost ground-effect performance, while Alpine remains the sole bottom-six team without any modifications.
• Red Bull plans to press on with iterative RB21 development through the summer break before reallocating its technical resources to its 2026 car under new regulations.