Our CSR Annual Review has once again been assured by external auditors, Two Tomorrows, who undertake independent scrutiny of the data and any claims we publish. A copy of the Assurance Statement can be viewed by clicking the menu bar on the left.

We have aligned our CSR Annual Review to the Global Reporting Initiative (GRI) Reporting Guidelines, third version. A list of GRI indicators and our responses is available at the end of each main section; Governance, Economic, Environment and Social.

We have self-declared an A+ application level with GRI-G3. In addition, the A+ level of application was endorsed by independent assurance company Two Tomorrows, who conducted a third party assessment of our GRI application level.

We acknowledge that energy supply companies sometimes use industry terminology that may not be immediately understandable to those outside our sector and while we strive to avoid the use of jargon wherever possible, we have included a glossary in this section, to help our readers understand terms they may not be familiar with.