Its on NEW cars. I believe there are big increases in road tax for new luxury and 4 x 4 because Jaguar are trying to sell cars this month before April's increases.
My pre 2017 2.0 litre Euro 6 diesel tin top is still £30 a year road tax, though I wouldn't be surprised at future hikes in diesel (and petrol) prices as the motorist is seen as a cash cow.
