I've just spotted this, in the "budget". I cannot quite work out, does this doubling of car tax apply to older vehicles / all cars - or just new cars sold from now? Below pasted from gov UK website.
Many thanks

5.86 VED First Year Rates – The government will change the VED First Year Rates
for new cars registered on or after 1 April 2025 to strengthen incentives to purchase
zero emission and electric cars, by widening the differentials between zero
emission, hybrid and internal combustion engine (ICE) cars.
• Zero emission cars will pay the lowest first year rate at £10 until 2029-30.
• Rates for cars emitting 1-50 g/km of CO2, including hybrid vehicles, will increase
to £110 for 2025-26.
• Rates for cars emitting 51-75 g/km of CO2, including hybrid vehicles, will
increase to £130 for 2025-26.
• All other rates for cars emitting 76 g/km of CO2
and above will double from
their current level for 2025-26.
Autumn Budget 2024 133
These changes will apply from 1 April 2025