IT is now ten years since the ban on smoking in certain public places was introduced in Scotland and there is no doubt it has been a success. There are some who link the ban with pub closures, but the health benefits are obvious. Fewer of us are exposed to second-hand smoke, and all of us can now enjoy a night out at the pub without breathing in other people’s smoke.

But does the ban go far enough? From today, it will be illegal to smoke in a car if there are children present and, while some activists think that is a patronising move, the logic is impeccable. Not only does the enclosed atmosphere of a car mean levels of second-hand smoke build up more quickly than they would elsewhere, children breathe faster than adults and therefore ingest more of the toxins. The moral principle of the ban is also sound: why should children be exposed to smoke when they have no choice?

As for going further and banning smoking in cars at all times, as some campaigners would like, caution is needed. Dr Peter Bennie, the chair of BMA Scotland, says a complete ban would protect adults, particularly vulnerable ones, and would be easier to enforce than the partial ban coming into force today. But where would such a ban take us next? A ban in outdoor places such as parks and gardens? Or even in private homes?

There are some who would support such a move, but while smoking remains a legal activity (and a vice that raises millions in tax) the right of citizens to indulge has to be carefully balanced against the rights of others to be protected.

A ban in public spaces on its own can also never really tackle the fundamental problem with smoking, which is one of addiction, so before we chase smokers out of every public, and private, space, we need to offer them more help to give up or move to safer alternatives such as e-cigarettes as a stepping stone to quitting. The ban on smoking around children in cars is a welcome move, but smokers need help as well as punishment.