Clive,
I do not doubt that there are thousands of cars on the road that have never seen a garage but you employers have different legal obligations than private motorists. Employers providing company vehicles also have to prove they have provided adequate training in use of the 'equipment', this may take the form of saying 'yes we have seen license therefore adequately trained' or they may take it further and provide driving courses; there are such courses for company car drives who clock up excessive miles each week.
Andy