Governments (certainly British ones) are bound up by enormous balls of inertia (not least how many votes might be lost) and are most unlikely to take any really bold steps - which banning tobacco would be. Doing so only in the UK or any one country would in all likelihood lead to prohibition levels of smuggling, gangsterism, etc. and, in spite of a ban, cannabis products are consumed in enormous quantities. I think, however, that there are major signs that governments worldwide are feeling uneasy about all substances that are harmful to health, not least if/when used in sufficient quantity. In this country as elsewhere the best hope is almost certainly provided by education, publicity and working toward the use of these things becoming un-cool. The most difficult ones to convince to leave the stuff alone are generally the "saddest" element of society (not necessarily the poorest or least educated), the ones who start for no particular reason except for what basically is foolishness. Without regarding myself as an expert, I find un-banning cannabis and perhaps all narcotics an idea worth considering to cut out the cancer of crime, but the major difficulty I still have with that is how to ensure only those who use them face the consequences. Everyone from immediate family to the whole of society is likely to share the burden - and that's where we came in, is it not ?