Private HGV Registration

[African Roads]

Hi,

After a bit of information. I have a Man truck with a self built body on the back. Unladen comes in at approx 9.5 tonnes (she is quite big!). Totally for personal use, no hire and reward involved. Has a fully functioning anaologue tacho fitted. Will get that calibrated to play it safe.

Question I have is: I would like to tax her as a PHGV.

To do that, do I need to get the V5 changed to classify her as a PHGV, or can I leave the V5 as HGV (which she is currently classified as), and just buy the tax as PHGV?

Hope that makes sense what I'm asking!

If I had to change the V5 to PHGV, would DVLA or VOSA or whoever is involved want to see pictures as to why I want to change the classification, or even inspect her at a vehicle station?

Thanks for any advice.