Up to 32 metric tonnes of Co2 in tailpipe emissions could be saved between 2020 and 2030 with a further 64MtCo2 between 2031 and 2050.
Despite this, Mr Buttle said any new tax hikes were “completely unnecessary” as motorists were already making the move towards new models.
Electric car sales have soared in 2020 with a 162.2 percent increase year-on-year for fully electric models.
Over 86,000 EV’s have been sold this year compared to 32,911 after eleven months in 2019.
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However, battery-electric models still only make up just 5.8 percent of overall sales as petrol and diesel vehicles still drove high numbers.
Over 840,000 petrol cars have been sold in 2020 despite this being almost 40 percent down on last year.