A group legal action against Nissan and Renault over alleged diesel emissions manipulation has been given the green light by Scotland's Inner House, despite efforts by the car makers to block the case. The Court of Session's Inner House has refused an appeal by Nissan companies that sought to prevent the case from progressing, affirming an earlier decision by the Outer House which allowed the action to proceed. The legal challenge centres on claims that Nissan and Renault deliberately used defeat devices in diesel vehicles to pass emissions tests, potentially misleading customers by asserting the vehicles complied with UK and EU environmental standards. The lawsuit accuses the manufacturers of fraudulent behaviour affecting roughly 8,500 claimants who say they suffered financial losses when the alleged misconduct came to light.