Vauxhall’s Ellesmere Port plant is one of many whose future lies in the hands of the merged auto giant

Carlos Tavares is an unashamed petrolhead, with a rally-racing hobby that harks back to an earlier automotive age. Yet carmakers like Stellantis, which he leads, and its rivals have had to set aside affection for roaring internal combustion engines as environmental rules set the limits for the industry.

Stellantis was formed in January in a €50bn (£43bn) merger between France’s Peugeot and Italian-American Fiat Chrysler, in one of the clearest responses to the Tesla-driven electric revolution: the merger will allow them to share expensive investments in battery technology.