A rise in average CO2 emissions from falling diesel car sales will soon become a big, prominent issue the car industry will have to deal with.
That's according to Jaguar Land Rover (JLR) group sales operations director Andy Goss, who said the rise in CO2 emissions was inevitable in the short term as buyers were turned off by diesel and went back to petrol instead, in lieu of a market full of plug-in hybrid and electric alternatives.
Indeed, in 2017, average CO2 emissions rose by 1g/km in the UK, the first increase since records began in 2002, as buyers turned away from the black pump due to the bad press and punitive tax changes made by the Government to put people off the fuel.
"The CO2 issue is not very well articulated at this stage," said Goss, who was announcing JLR's record annual results for new car sales in 2017. "It needs to be. We need a balance on this, and we will try and articulate it ourselves.
"The CO2 agenda has not gone away. It's not just about CO2 or NOx – each is an agenda. All manufacturers are investing in electrification; it's in all interests to navigate a glide path together."
Goss said that the switch away from diesel was not currently impacting on any of JLR's future investment plans, because its new range of four-cylinder Diesel engines were part of the wider Ingenium family, with flexible production at the firm's Wolverhampton engine plant. However, it did cast long-term doubts over the future of the fuel.
"It's not affecting future investments," said Goss. "With Ingenium engines, we can flip-flop between the two. Is there a way back for diesel? That's impossible to answer, but fiscal policy is only going in one direction. That brings CO2 awareness - in a move to petrol, CO2 emissions go up. It's a worry."
Goss is confident JLR can still meet its EU-mandated target for average CO2 emissions of new cars sold in the EU, believed to be around 130g/km. But he said the sharp, unexpected switch away from diesel "provided an extra challenge to hit the target".
Diesel sales in the UK are likely to take yet another hit from April, when taxation will increase unless they meet a certain certification standard – the test for which doesn't even exist yet.