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?

When does road tax for EVs start?

When does road tax start for privately owned EVs?

When do I have to start paying car tax on my EV?

I have a full electric car (1st reg Sept 2019) and I wondered if I registered it SORN at Christmas (when it will not be used for a month) and re-tax it in January, will I get 1 year at £0 - or will I get...

How much more expensive is the tax on a £40,000+ car?

What are the long term and short term cost differences between two different specs of the same new car, one retail priced below £40k and the other retail priced over £40k? Ignoring any discount that may...