not sure. It says:
"
Operative date
The change in the law will apply from 1 April 2020. This change will apply to all zero-emission vehicles registered from 1 April 2017 until 31 March 2025.
"
that suggests that the 2025 date is actually a date of registration in which case all EV's registered between now and then will not have to pay it ever.
however the financial impact only goes out to 2025 which implies it a licence date. if it was a registration date the impact would go to 2031.
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