You need the sticker doesn't matter if you don't smoke or are the only user of the van, Smurf be careful if your vehicle is
insured for more than one driver.
Ta but I'm the only insured driver on the policy and work on my own so should be ok 
You should be, the crafty jobsworth that stopped me a few years back would have done me if he had found evidence that I had
been smoking as my wife is also on my insurance, he even checked the ashtray. (roll eyes)
Luckily I already had a sticker.