Red Bull’s closed-door test at Silverstone has exposed growing tension within the team ahead of the crucial Miami upgrades. While Max Verstappen used the filming day to help address key weaknesses of the RB22, Ferrari and McLaren are preparing heavily revised and potentially revolutionary cars. The spring break has reignited an intense technical development battle in Formula 1, and it remains to be seen who will come out on top.
Red Bull filming day used to mask technical concerns
A secret was unexpectedly revealed almost by accident, helped by a location that was far too exposed to the public. The luxurious rooms of a hotel overlooking the famous Silverstone pit straight suddenly became an exclusive VIP viewing area for the occasion. On Wednesday 22 April, unsuspecting guests witnessed an unexpected sight: the Red Bull RB22 hitting the track.
No official announcement had preceded the event and no accredited journalists were present on site. The team had hoped to run the car away from prying eyes, in complete silence in the English countryside. However, in the modern era dominated by smartphones and instant sharing, hiding a Formula 1 car has become virtually impossible.
Clear images of Max Verstappen’s running quickly spread across the world, effectively destroying Red Bull’s plans for maximum secrecy. Private testing during the season is strictly prohibited under current sporting regulations. However, teams are allowed two promotional “filming days” per year for commercial content.
The most interesting detail from the RB22 appearance concerns a so-called “Macarena-style” rear wing concept designed to reduce drag on high-speed sections. The peculiarity of the solution lies in the use of a central actuator, unlike Ferrari, which, as is known, opted for a mechanism integrated into the side endplate for opening and closing the wing.
The working day in England was considered absolutely crucial. Max Verstappen was able to personally evaluate the latest aerodynamic updates, while engineers at the pit wall studied new strategies linked to complex energy deployment management. Valuable work, especially considering that the British circuit will host the Grand Prix at the beginning of July.
Chronic weaknesses and rising pressure from rivals
Why burn a promotional filming day at this specific moment? The answer lies in the unexpected technical difficulties faced recently. The April break did not bring much stability inside the reigning champions’ garage. At Suzuka, Red Bull introduced a major upgrade package including a new floor and heavily revised sidepod geometry.
Internal expectations were extremely high, yet the Japanese weekend delivered a disappointing verdict. The expensive aerodynamic package did not perform as expected. The main issue reported by drivers was poor overall balance in cornering. Engineers attempted multiple setup changes, but the fundamental problem remained unresolved.
This triggered a frantic race against time at the Milton Keynes factory. A new evolution of the bodywork aimed at generating more downforce is set to debut in Miami. Powerful simulator data suggests a performance step forward, but confidence in virtual tools appears to be weakening. Real-world validation on track is now essential to avoid going in the wrong direction.
The American Grand Prix will also feature the Sprint format, leaving teams with only a single free practice session. This is an extremely limited window to test and validate new technical components. Arriving in Florida without sufficient data would represent an unacceptable risk for a team fighting at the very top, making the Silverstone test a near-mandatory technical decision.
F1 2026 development race intensifies ahead of Miami Grand Prix
Red Bull is not the only team taking advantage of this rare race-free period. The entire paddock has been working at an extremely intense pace. On the very same day Verstappen was running secretly in England, Ferrari completed a crucial session at Monza to gather initial data on its brand-new aerodynamic package.
A few days earlier, again in the Lombardy region, the newly formed Audi project also ran testing focused on optimizing the complex hybrid power unit electronics. Mercedes, meanwhile, completed an extensive Pirelli tyre test at the Nürburgring. The Miami weekend will therefore mark the start of a new competitive phase: at Maranello there is talk of a heavily revised red car, while McLaren is preparing a fundamentally redesigned machine. The battle at the front is about to restart in full force.
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