Re: Office refurbishment...
I vaguely remember those... IIRC, they were pretty useless, as the static shock was more commonly a product of bodies moving on seats and generating a charge, than the car generating and retaining a charge - as was evident when one person got out, didn't get shocked, but the second person leaving the vehicle did.
Incidentally, women are responsible for more petrol station fires because of this - they will often fill the tank, then go back in the car to grab their bag from the passenger side, then get out again, generating a charge as they do so - discharging that can in rare cases ignite petrol vapor.
Men tend to keep their money in wallets on their person so don't re-enter the car, and so don't generate the additional charge.
This static discharge from the body is suspected to be the most common source of petrol station fires.