Data and assurance

We measure our performance through a range of metrics and have provided them all in one place to help our stakeholders see how we’re doing.

We use external assurance to provide confidence that we are accurately reporting our performance. We believe that putting our systems and processes through third party review helps us enhance the trust stakeholders have with us. PwC is our external assurance provider. 

We report our data aligned to our Reporting Principles and Methodologies, which covers all our Sustainable Business Performance metrics including those assured by PwC. 

Please see below for this information from 2015 onwards. Prior to 2015 this was included in the Corporate Responsibility Reports from those years, which you may find here.

Date Report HTML Full PDF
09 June 2023 ESG performance data
09 June 2023 Assurance Report
09 June 2023 Non-carbon reporting principles and methodologies
09 June 2023 Carbon reporting principles and methodologies
Date Report HTML Full PDF