To trade as a Ltd company or not

Just a little bit off topic but: Self employed,Limited or Sole Trader you have to be careful how the taxman Inland Revenue see it.

I had a lot of problems convincing them I was self employed as I was running one truck getting work from one company officially. I was a sub contractor and getting paid on return of cmr but when I had a tax examination they made out I was just a driver! I was that driver who paid for his own truck, fuel, tyres and insurance. Be warned. The VaT can use the same argument