thats good to hear me m8 got done carrying sumone in the back of his van 60 qud fine and copper let him off with the 3 pointsYes, passengers can legally travel in rear of campervan, as long as seatbelts are legally fitted.
seatbelts and an adequate seatI am guessing the difference here Brightspark was the seat belts?
No, it's not classed as a commercial as it is a CSW and is only a seven seater. I have a copy of Construction & Use here somewhere so I'll try to find time to look up what it says on the subject.