David MacKintosh has over 25 years’ experience of working on alcohol and drug policy, which has included working within the UK Cabinet Office (UKADCU), heading up the London Drug and Alcohol Policy Forum (LDAPF) and providing specialist advice to the Greater London Authority. He also spent six years as Head of Community Safety for the City of London and has served as a trustee of a number of charities addressing substance use problems. He has helped deliver a range of innovative campaigns and national best practice guidance, which have all had one common purpose, to reduce harm to individuals and communities. In 2020 he began working as an independent consultant and is now helping Knowledge•Action•Change support and develop evidence based harm reduction programmes.