JLR, Britain's biggest carmaker, said it will lose 4,500 jobs from its global workforce, the majority of them management roles in the United Kingdom at sites including Coventry and Gaydon.
The company says the job losses will be global, but it's understood most of the redundancies will occur in the United Kingdom, where the automaker employs around 43,000 people.
The slump in demand for diesel cars and a slowdown in China have also been blamed.
Tata-owned JLR, based in central England, said it will cut 4,500 out of 42,500 jobs, while Ford said it will slash "thousands" of jobs as part of an overhaul that could result in plant closures and the discontinuation of some models.
Unite, the country's largest manufacturing union, said it would be pressing the vehicle maker to safeguard its members' jobs. Through our modern Industrial Strategy, we are building on those world beating strengths and investing in the future to put the United Kingdom at the forefront of the next generation of electric and autonomous vehicles.
The company said it will produce next-generation electric motors at its engine plant in Wolverhampton, and assemble batteries at Hams Hall, also in the U.K.'s West Midlands region.
Armstrong also warned a no-deal Brexit could result in further job losses in the United Kingdom, and did not rule out the closure of British plants if there were no agreement.
The luxury carmaker employs 44,000 workers in the UK
Jaguar Land Rover Chief Executive Ralf Speth said he had serious concerns about the impact of a hard Brexit but it was not possible to predict what steps might be required if that happens.
"Britain's auto workers have been caught in the crosshairs of the government's botched handling of Brexit, mounting economic uncertainty and ministers' demonisation of diesel, which along with the threat of a no deal Brexit, is damaging consumer confidence", Unite national officer Des Quinn said. Will you be affected by the job cuts?
Jaguar Land Rover have today confirmed plans to offer voluntary redundancy packages to their United Kingdom workforce as they reduce their global headcount. This latest round of cuts comes on top of the 1500 jobs Jaguar Land Rover cut previous year. Rolls-Royce is part of what I would call the British industrial crown jewels.
The company pointed to a downturn in China and lower demand for the diesels which make up most of its products.
But sales there have fallen almost 50% in recent months as cautious Chinese consumers have been holding back on big ticket purchases.
It has hired 4,000 workers in China since 2014. One thousand people employed at its Castle Bromwich factory had their working week cut down to three days.
Most recently it announced it would move all production of the Land Rover Discovery to a new plant in Slovakia with plans to hire up to 3,000 workers. In the a year ago alone, the company's global product portfolio has expanded to include the all-electric Jaguar I- PACE, the Range Rover and Range Rover Sport with PHEV derivatives and, most recently, the new Range Rover Evoque, also with next-generation hybrid technology. The UK is a world-leader in automotive manufacturing.