We also collaborate with some of our Tier supply base directly and work with them to improve standards. http://www.vodafone.com/content/index/about/conduct.html http://www.vodafone.com/content/dam/group/suppliers/downloads/VPC_Supplier%20Policy_A2_Code_of_%20Ethical_Purchasing_(V3.0).pdf http://www.vodafone.com/content/dam/vodafone-images/sustainability/downloads/slaverystatement2017.pdf http://www.vodafone.com/content/dam/vodafone-images/sustainability/downloads/slaverystatement2017.pdf http://www.vodafone.com/content/index/about/suppliers/our_policies_processes_and_tools.html We require relevant suppliers to have a policy in place for the responsible sourcing of metals and minerals and – most importantly – to maintain clear procedures to avoid knowingly purchasing so-called ‘conflict minerals’.