Roads, parking and other infrastructure that de facto subsidize and encourage private car usage but which often are considered "free".
Taxes on fuel raise £50Bn/year for the exchequer, which is double the amount spent by the government on all transportation of all kinds. No one considers it to be “free”, and in fact drivers subsidise everything else.
Given that the entire NHS budget is £125Bn I'm guessing... not much?
How many lives has the road system saved, by the way? What do ambulances drive on? Or even ordinary drivers taking sick or injured relatives to the hospital themselves?
Taxes on fuel raise £50Bn/year for the exchequer, which is double the amount spent by the government on all transportation of all kinds. No one considers it to be “free”, and in fact drivers subsidise everything else.