Britain's top police officers are beginning a two-day conference to discuss the battle against illegal drugs.
The Association of Chief Police Officers event will focus on future opportunities, challenges and threats facing law enforcement officers and communities.
And senior officers will also discuss the threat of the emergence in the UK of a new super-addictive drug, methylamphetamine - or crystal meth, which has devastated poor communities in the US.
Humberside Police Chief Constable Tim Hollis, recently appointed chairman of the Acpo drugs committee, will introduce the Manchester conference, and give information on current police drugs strategy.
Speakers include Andy Sellers, Deputy Director for London Enforcement for the Serious and Organised Crime Agency (Soca), District Judge Justin Phillips from west London's dedicated Drugs Court and the Hon Judy Harris Kluger from the New York Court system.
There will also be a ministerial address by Vernon Coaker, Parliamentary under-secretary for policing, crime and community safety.
