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LIVE – Updated at 16:09

Mercedes have reportedly been testing upgrades ahead of this weekend’s Spanish Grand Prix at a behind closed doors filming day with George Russell at the wheel. F1’s rules allow for two filming days a year where teams can run up to 100km in their current cars, enabling them to trial new upgrades. Mercedes are still searching for their old edge after a difficult start to the season, with Russell already 55 points adrift of championship leader Charles Leclerc while Lewis Hamilton’s struggles have seen him fall even further back.

Ferrari are said to have used one of their own filming days last week as Leclerc seeks to halt Verstappen’s momentum. The Red Bull driver and reigning world champion has won the last two races after reliability issues mired the start to his season. The Dutchman has fine memories of Barcelona, having won his