On Toyota's brightly lit assembly line here, workers guide wheel and engine assemblies into unfinished sedans. Driverless carts carry parts through narrow aisles to work stations. The assembly line moves with clockwork precision, able to pop out a vehicle every 72 seconds.
Britain's auto industry, once ailing and plagued by strikes, now hums with the vibrancy of a global manufacturing hub. Most of the cars made in Burnaston, models like Auris and Avensis, will make their way beyond the British borders. Toyota buys parts and hires workers from across the European Union.
But the level of integration, previously lauded, has made the carmakers especially vulnerable after Britain's vote to leave the bloc. If a messy divorce follows, Toyota and others face the prospect of higher tariffs, a smaller labor pool and less access to the 500 million potential customers in Europe - all of which will be negotiated in the coming months and years.
The drop in the British pound since the vote has not been much help either. Many of the carmakers' contracts here are priced in euros, even with suppliers in the same country like Johnson Controls, which makes seats for Toyota.
“We have made clear that if we lose some of these elements, it will make making cars in the U.K. less competitive,” said Anthony J. Walker, deputy managing director of Toyota Manufacturing in Britain. “We would have to reduce costs, which would be very hard.”
Carmakers like Toyota are now in full-on defense mode. Toyota and others are telling the government that they need continued, unfettered access to the European Union, for exports, imports and engineering talents, which they say are in short supply in Britain. Toyota is particularly concerned that its just-in-time manufacturing system - which requires that parts arrive at the plant in a certain order just a few hours before assembly - should not be disrupted.
“It is absolutely suicidal,” said Peter Tsouvallaris, the plant's senior representative for the union, Unite, which also represents workers at other carmakers. “I am concerned about the long-term future of the plant because we don't know what Brexit means.”
The British government understands the stakes for the country, which is home to a cluster of world-class plants for overseas automakers like Nissan, General Motors, BMW and Honda. The sector employs about 169,000 workers and accounts for about 12 percent of the value of British exports, according to the Society of Motor Manufacturers & Traders, an industry group.
Already, the British prime minister, Theresa May, has shown a protective streak. The government has promised to invest 390 million pounds, or $485 million, to encourage advanced, low-emission vehicles, including driverless and electric cars. It has said it will continue to fund training for Toyota and other auto companies, as well as encourage development in component makers based in Britain.
Britain also offered assurances to Nissan, whose plant in Sunderland became a flash point in the time before the vote over the so-called Brexit. Although specifics have not been made public, Nissan said in October that it would build a new version of its popular Qashqai and another model at the plant.
“The support and assurances of the U.K. government enabled us” to make the investment decision, Nissan's chairman and chief executive, Carlos Ghosn, who had recently met Mrs. May, said at the time.
