What is the car tax on my converted VW Transporter?

I own a 2012 Volkswagen T5 which was converted in 2017 to a pop-top camper with windows etc. My V5C section D5 body type was changed to motor caravan in 2018. What should I be paying for road tax?

Does VED on hybrids go up next year?

Will hybrid cars costing £40k have to pay higher RFL in 2025?

How can I check if a used car attracts a tax premium?

When buying for example a two year old car is the seller either private or a dealer obliged to inform you that when new it's list price was over 40k and is therefore subject to the extra premium tax until...

Does the premium car tax £40,000 rate include options?

If I purchase a new car sub £40,000 it is not subject to luxury tax but if I add options which take it over 40k is it liable to the luxury car tax?