Mercedes chairman Niki Lauda says the FIA has made a mistake by committing to the Halo for 2018.
On Wednesday, the FIA announced it would push ahead with the introduction of cockpit protection device next year after the rival Shield concept proved unusable during its first test at the British Grand Prix last week. Despite facing opposition from Formula One's Strategy Group on Wednesday, the FIA cited last year's decision to postpone Halo until 2018 as its mandate to introduce the device next year and is hoping the teams will help modify the existing concept to make it better.