British new car sales fell nearly 30% last year in their biggest annual drop since 1943 as lockdowns to curb the spread of the coronavirus hit the sector, an industry body said on Wednesday.

Demand stood at 1.63 million cars in 2020, according to data from the Society of Motor Manufacturers and Traders (SMMT). It was particularly hard hit by a 97% fall in April, the first full month of a national lockdown.

Dealerships gradually reopened in June on differing dates across the United Kingdom’s four nations.

“We lost nearly three quarters of a million units over three or four months, which we never got back,” said SMMT Chief Executive Mike Hawes.

Showrooms in England were closed again during a second lockdown in November but many were better prepared with “click and collect” options, allowing more purchases, but still leading to a 27% year-on-year slump.

The performance leaves new car sales at their lowest level since 1992, and suffering the biggest drop since 1943, when sales fell by more than 90%.

Then, Britain was fighting World War Two and industry was repurposed for the effort.

In 2020, diesel car registrations more than halved, while nearly 30% of sales were electric, hybrid and mild hybrid vehicles as Britain brought forward a ban on the sale of new combustion engine-only cars to 2030.

The sector was also awaiting a trade deal with the European Union. An agreement was reached on Dec. 24, meaning immediate tariffs and disruption were avoided, but the sector has warned of additional costs.

The car sector, like others, now faces the challenge of new lockdowns announced in England and Scotland this week.

The SMMT expects sales to be below 2 million this year, with the sector nervously looking ahead to March, one of the top two selling months of the year due to the change in the licence plate series.

“Where the industry is focussed at the moment, is what do we need to do to try to sustain sales, sustain manufacturing over the next two to three months, especially with March being such a critical month for the industry and that will undoubtedly be affected,” said Hawes.

Britain’s car industry warned on Wednesday the Brexit trade deal will add additional costs to firms, despite the sector securing tariff-free trade with the European Union, just as it needs to pick up investment in electric vehicles.

On December 24, London and Brussels reached an agreement that secures zero-tariff and quota-free trade for the automotive sector, subject to vehicles containing a minimum level of parts sourced from the region.

The deal avoided any major disruption from January or a 10% tariff.

But SMMT said additional bureaucracy and the need to approve vehicles separately in both the EU and Britain, among other costs, would add up.

“It can be high single-figure percentage cost to an individual manufacturer. This is not a free deal,” said SMMT Chief Executive Mike Hawes.

“The paperwork ..., you used to do it on a minority of vehicles. Now you’re doing it on just about all your vehicles, apart for those that are going to the UK market.”

Automakers will need documentation to prove vehicles meet new UK and EU content thresholds set at 55% for conventional models, with a one-year grace period.

The initial local content threshold is lower for electric vehicles, set at 40%, but due to rise, reflecting the high amount of battery content that comes in from Asia.

Britain and other European countries will be vying for more green investment, such as battery gigafactories, over the next decade as bans on conventional vehicles loom.

Workers on Tuesday called on French automaker PSA to build electrified vehicles at its northern English factory, in a major upcoming investment decision.

“One of the big challenges for the UK now is to... see battery manufacturing established in the UK and grow in the UK to compete with Europe, and indeed, compete more globally,” said Hawes.

Meanwhile, Britain’s economy made only a subdued return to growth in December after shrinking during a four-week England-wide coronavirus lockdown in November, as the large services sector failed to fully recover, a survey showed on Wednesday.

The IHS Markit/CIPS composite Purchasing Managers’ Index (PMI) rose to 50.4 in December from 49.0 in November, a slightly smaller increase than in an earlier flash estimate.

The services PMI, which makes up the largest part of the composite index, remained below the 50 mark which separates growth from contraction at 49.4. This was up from November’s five-month low of 47.6 but also below the flash reading.