Mo Mowlam MP and drugs Tsar Keith Hellawell were among several high-profile speakers at the recent Mentor Foundation's first International Forum on Drug Abuse Prevention, hosted by global broker Marsh.
The conference was attended by more than 100 representatives from 50 countries.
Marsh International chairman Rob White-Cooper said: "We decided to link our community programmes with difficult social issues. As an employer of over 30,000 people operating in more than 100 countries, we need to be aware of the drugs issue for the sake of our clients, colleagues, and communities."
