It would have to be someone he’s on good terms with. He’d have to have spent time with that driver to witness repeated chain smoking.
I’m guessing it might be an older driver, someone who have been around when cigarette sponsorship was not widely regulated. And a lot of the younger drivers are in driver development programmes, so I imagine that training and health management is a part of their regimen.
There are also a couple of drivers like Button and Webber who are dedicated health nuts – Button regularly does triathlons, while Mark Webber has the Mark Webber Challenge each year.
I think it might be one of the HRT drivers.