Professor Catherine Comiskey:

Yes. It has looked at all the different policies and to see if we have increased cannabis use where we have reduced the penalties. The answer has been found to be "No". The research looked at where we have had increased penalties and made them worse to see if we have decreased use and if there is a relationship. It was found there was not a single relationship. The number of people going to use cannabis has nothing to do with the legal system. People are going to use it or not use it.