Campaigners and environmental organizations have called on the UK government to maintain current electric vehicle regulations, following new analysis that quantifies the carbon impact of recent policy modifications. According to research based on updated Department for Transport forecasts, the changes implemented in the previous year will result in approximately 17 million additional tonnes of direct carbon dioxide emissions from vehicles on UK roads by 2030. This increase is attributed primarily to regulatory flexibilities that permit manufacturers to sell additional plug-in hybrid electric vehicles alongside traditional combustion-engine cars.
The zero-emission vehicle mandate was originally introduced in 2023 to require carmakers to increase electric car sales to 80 percent by 2030. However, modifications implemented last year introduced loopholes allowing manufacturers greater flexibility in meeting targets. In response, the car industry has significantly increased sales of plug-in hybrids, which combine small batteries with petrol engines. Industry analysis indicates there will be approximately 59 billion additional miles driven using petrol and diesel engines compared with pre-mandate-change forecasts, equivalent to the annual emissions of a small European nation.
The automotive industry has continued advocating for further relaxation of the rules, arguing current requirements are too stringent and do not align with market conditions. Analysis suggests that while reported electric vehicle sales appear strong at 33 percent, manufacturers using available flexibilities could theoretically achieve mandate compliance with electric sales as low as 7 percent. However, environmental groups and the charging infrastructure sector warn that additional weakening would undermine the transition away from combustion engines and destabilize investment in charging networks.
Research has also highlighted concerns about plug-in hybrid performance and emissions reporting. Studies indicate these vehicles frequently fail to deliver promised fuel savings and that major manufacturers underestimate vehicle emissions by approximately one-third on average. The government has committed to conducting another review of the mandate by early 2027 and maintains its target of phasing out new non-zero-emission vehicle sales by 2035.