Agree with Ethel (and so do the Welsh Assembly) :
http://news.bbc.co.uk/1/hi/wales/7524526.stm
Ceredigion Council said they could not comment on individual cases.
A spokesperson added: "The legislation allows for a right of appeal and the procedures in relation to this are set out in the notices."
A Welsh Assembly Government spokesman said: "The smoke-free regulations state that a vehicle shall be smoke-free if it is used for work by more than one person, regardless of whether they are in the vehicle at the same time, to protect everyone who uses the vehicle from the harmful effects of exposure to second-hand smoke, regardless of when they use the vehicle.
"Smoking is permitted in vehicles used for work purposes that are for the sole use of the driver and are not used as a workplace by anyone else, either as a driver or a passenger."
Sounds like someone was being over zealous.
UNLESS he employs staff and was giving them a lift of lets them use the van.
If he 'employs' his wife as a tax dodge, then he has no chance, since she has already admitted to using the van.