One has to be wary because certain things are not covered. A friend of mine purchased a new router for his business, which , when he got it back to the workshop, didn't work. The firm he bought it from would not refund his money, and after advice from Trading Standards, had to settle for a repair.
All the vehicles I ever used for business were in fact for personal use as well. They were purchased for personal use ( not through my business) and I claimed a percentage of the running costs back on my tax return.
I assume that if I had a vehicle solely for the business, then this would be a B2B transaction., though on the plus side I would have been able to claim back the VAT.
As I understand it the goods you buy still have to meet certain criteria, But in case of a dispute it will probably be their lawyers against yours, which, if you are only a sole trader , might be a bit of a miss-match