THE EU and the UK are being urged to strike an immediate agreement to avoid damaging Brexit tariffs on electrified vehicles.

The plea by the Society of Motor Manufacturers and Traders and echoed by the EU auto sector, is to delay the implementation of tougher new Rules of Origin (ROO) requirements on batteries which could render EU and UK made electrified vehicles uncompetitive in each others' markets.

As the clock ticks down to the January 1, 2024 ROO introduction, new calculations lay bare the impact the new rules, set under the EU-UK Brexit deal, would have on vehicle affordability and competitiveness.

Electrified vehicles that do not meet the new thresholds will be subject to a 10 per cent tariff when traded across the Channel, resulting in a combined cost of £4.3 billion.

For the consumer, this could mean an average price hike of £3,400 on EU-manufactured battery electric vehicles (BEVs) bought by British buyers, and a £3,600 rise on UK-made BEVs sold in Europe.

Even against a backdrop of the pandemic, crippling semiconductor shortages and trade tensions, EU-UK electrified vehicle trade has more than doubled recently, enabled by the EU-UK Trade and Cooperation Agreement (TCA).

It has grown 104 per cent in the three years since the TCA was signed, up from £7.4 billion at the end of 2020 to £15.3 billion last year, although much of this uplift has been in the past 12 months.

The situation has helped total UK automotive global trade in finished vehicles and components get back on track following the pandemic, and it is currently on course to be worth more than £100 billion by the end of 2023, according to the latest SMMT report, Open Roads - Driving Britain's Global Automotive Trade.

This growth is now threatened, however, as rules that were agreed before the pandemic, war in Ukraine and supply shortages come into force in just 75 days' time.

With almost half (49.1 per cent) of all new BEVs registered in the UK in the first half of the year coming from the EU, any cost increase would act as a barrier to uptake, undermining their competitiveness in an important and growing market.

Furthermore, the application of a 10 per cent tariff on electrified vehicles alone would undermine shared ambitions to be global leaders in zero emission mobility, holding back markets and undermining the drive to deliver net zero, given road transport remains the biggest contributor to overall carbon emissions.

Conventional petrol and diesel vehicles would escape tariffs, meanwhile, which would have the perverse effect of incentivising the purchase of fossil fuel-powered vehicles.

Such a scenario would not only steer British car buyers away from buying the vehicles needed to hit net zero, it could also lead to a reduction in consumer choice if any electrified models become uncompetitive in the marketplace overnight.

The challenge comes at a crucial time, with manufacturers also facing the UK Zero Emission Vehicle Mandate, which is likely to come into force on the same date in 2024 and compel them to sell ever-increasing numbers of zero emission models, starting at 22 per cent next year and rising to 80 per cent by 2030.

The SMMT said a three-year delay to the introduction of the stricter rules of origin is a pragmatic solution. It would provide the necessary time for EU and UK gigafactories to come on stream as well as helping the development of local battery parts and critical mineral supply chains. The postponement is also something that can be readily achieved within the existing TCA framework, avoiding formal re-negotiation and delivering a boost to EU and UK manufacturers.

Mike Hawes, SMMT chief executive, said:"UK Automotive is a trading powerhouse delivering billions to the British economy, exporting vehicles and parts around the world, creating high value jobs and driving growth nationwide.

"Our manufacturers have shown incredible resilience amid multiple challenges in recent years, but unnecessary, unworkable and ill-timed rules of origin will only serve to set back the recovery and disincentivise the very vehicles we want to sell. Not only would consumers be out of pocket, but the industrial competitiveness of the UK and continental industries would be undermined. A three-year delay is a simple, common-sense solution which must be agreed urgently."