Leaving the European Union without a new deal with the EU could destroy the car industry and put hundreds of thousands of jobs at risk, a major inquiry has warned.

Even quitting with a trade deal in place can only hurt rather than help the automotive sector, which directly or indirectly employs 900,000 people across the UK.

The findings from the cross-party House of Commons Business Committee reveals the threat to thousands of jobs at mnaufactuers including Jaguar Land Rover in Birmingham and Solihull and BMW in Warwickshire,

MPs said the UK must stick as closely as possible to existing EU rules and institutions “in order to give volume car manufacturing a realistic chance of surviving in this country”.

Crucially, the inquiry found that keeping access to the EU single market is far more important to car manufacturers in the UK than signing new trade deals with other countries.

It follows warnings from the Society of Motor Manufacturers and Traders, which represents the car industry, that failing to agree a free trade agreement with the EU would result in a £4.5bn drop in exports by UK carmakers.

And there is also a major threat from the possible introduction of what are called “non-tariff” barriers, which would mean delays and bureaucracy as car parts and vehicles are transported across borders.

At the moment, there are very few delays because of the UK’s membership of the EU’s Customs Union.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge tour the Range Rover production line during their visit to Jaguar Land Rover

Carmakers would suffer enormously if any delays are introduced, because they import parts from across Europe and depend on them arriving quickly.

Committee chair Rachel Reeves said: “The car industry is one of the UK’s great manufacturing successes. Innovative and efficient car plants across the country provide thousands of jobs and the automotive sector is a major contributor to our economic growth.

“There is no credible argument to suggest there are advantages to be gained from Brexit for the UK car industry.

“Regulatory consistency and friction-free trade benefits car companies, consumers and car-workers. The Prime Minister now needs to ensure common-sense pragmatism prevails and spell out the Government’s intention to seek continued regulatory and trading alignment with the EU in the automotive sector.”

MPs spoke to carmakers and visited the Honda factory in Swindon. They also heard evidence from Business Secretary Greg Clark and EU politicians, and they said the received “a certain amount of information from companies in confidence, which we do not publish but has nonetheless helped inform our conclusions.”

Here are some of the key findings:

Leaving the EU without a deal would involve the introduction of a 10 per cent tariff on cars

“The current profit margin of around £450 on a £15,000 car would be comfortably wiped out,” MPs said.

But the alternative was to pass the extra cost on to customers. They warned: “Such an increase would inevitably have an impact on sales.”

A BMW production line

A “no-deal” Brexit would force global car-making giants to close UK factories

MPs said global firms invest in the UK because they are currently able to sell cars built here across the EU.

“Inward investment from major Japanese companies over the last 40 years has been instrumental in revitalising car manufacturing in the North East and West Midlands.”

But firms would move production to other countries if tariffs were imposed on exports from the UK to the EU.

“In simple terms, it is difficult to see how it would make economic sense for multinational volume manufacturers - the bulk of the UK automotive sector - to base production in the UK . . . the shift of manufacturing to countries within the customs union and single market would be inevitable.

“The cost in UK jobs could be in the hundreds of thousands.”

Carmakers could struggle to recruit skilled workers if it becomes harder for EU citizens to work in the UK

“The Government should also seek a deal on immigration that enables the sector to access the full range of skills it requires and should further incentivise locating relevant research and development in the UK once we leave the EU.”

Brexit won’t help the car industry - the best the UK can do is to try to limit the damage

“Overall, no-one has argued there are advantages to be gained from Brexit for the automotive industry for the foreseeable future. We urge the Government to acknowledge this and to pursue an exercise in damage limitation in the negotiations.

“This involves retaining as close as possible a relationship with the existing EU regulatory and trading framework in order to give volume car manufacturing a realistic chance of surviving in this country."

Land Rover Discovery production at Jaguar Land Rover in Solihull.
Land Rover Discovery production at Jaguar Land Rover in Solihull.

Cars made in the UK can be less than a quarter “British” for trade deal purposes, because they contain so many parts from other countries in Europe

It means they might actually be excluded from future trade deals allowing the UK to export British-made goods to other countries.

To counter this, the Government will need to sign trade agreements in which “EU content can count as UK and vice versa”.

New trade deals would not make up for losing access to the EU single market.

“We looked hard at potential opportunities arising from Brexit. We found that it is unrealistic to expect an expansion of trade overseas to outweigh the loss of trade to Europe arising from a hard Brexit.”

“Retaining good access to the single market is more important than securing the freedom to secure new trade deals with

third countries."

Jaguar Land Rover supplied 30 cars that appeared on screen in James Bond film, Spectre.
Jaguar Land Rover supplied 30 cars that appeared on screen in James Bond film, Spectre.

But car-making is vital to the UK’s economy

“The automotive sector is one of our key manufacturing industries: it contributes around one per cent of the UK’s output and 9.4 per cent of UK manufacturing output.

“It employs 169,000 people directly, many in the manufacturing hub in the West Midlands, and a further 814,000 in associated supply chains throughout the UK.”