TSi LPG Conversion - tax rate?

[Irvine101]

I have just converted my TSi to LPG and I sent off the V5 to DVLA to update it to LPG / petrol. However DVLA have returned it to me unchanged, stating that I need to amend the tax class of the van first using form V10.

I am confused as to what to put.

Does anyone know what Tax Class I should amend it to on form V10?

 

[DXX]

Vehicle tax rates
I think you need to class it as an alternative fuel car and use the same CO2 rate as the original petrol engine. If the info is anywhere it’s on this site.