Why McLaren's broken curfew two F1 races running

McLaren broke the F1 curfew for the second consecutive race heading into qualifying at the Barcelona Grand Prix, using one of their four permitted exemptions to carry out precautionary work on both cars overnight on June 13, 2026. The work involved replacing key components to improve the robustness of the power unit installation and integration on both Lando Norris's and his teammate's cars. The precautionary measures stemmed from concerns arising from Norris's Monaco GP problems, where he stopped on track during Friday practice due to issues that included a faulty wiring harness and ESME pack.