Independent data assurance and verification processes for our Sustainability Report are conducted at both the local facility and Group levels by independent third parties.
Environmental and some selected social performance data of operationally controlled assets, which have been operating for a full calendar year, have been independently verified by an external service provider directly engaged by each asset in the different countries in which they operate. Our aggregated Group Sustainability Report data makes use of the verification work done at the asset level. Our verified asset level data are accessible via our Asset Performance Statistics, available
Limited assurance on a selected set of the key environmental, social and governance performance data for this year's Sustainability Report was performed by PricewaterhouseCoopers (PwC) in accordance with International Standard on Assurance Engagements 3000 (Revised) Assurance Engagements other than Audits or Reviews of Historical Financial Information and International Standard on Assurance Engagements 3410, Assurance Engagements on Greenhouse Gas Statements. The assured data points are those in 2015 which are unshaded in the Key Performance Indicators table via our Group Sustainability Statistics, available
Assurance Statement available