Appalled by the alarming 32% increase in opiate-overdose deaths in 2013 in England, Blenheim and IDHDP called for a Naloxone Action Summit to identify ways to reduce the number of unnecessary deaths.
More than 22,000 people have disappeared since the Mexican government launched its war against drug cartels in 2006 - leaving the victims' families in limbo.
The talks between Santos and Clegg will be seen as a significant strengthening of the emerging liberal alliance on drugs reform in the lead up to the 2016 UN Special Session on drugs.