Approach and governance

Scope of reporting

Our online non-financial report 2018/19 is for the year ended 31 March 2019 and covers our wholly-owned global operations. We report in the areas of environmental sustainability, people and communities. 

We will publish our 2019/20 non-financial performance report in July 2020.

Key financial information is predominantly located in the Annual Report and Accounts. Background information about National Grid is set out in other areas of the corporate website.

Assuring our reports

We carry out external and internal assurance to:  

  • ensure the content of our reporting on material non-financial issues and performance is balanced and accurate, and fairly reports our material risks, impacts and performance
  • test our awareness of and response to stakeholder issues
  • obtain an independent view of developments in our non-financial strategy, management and implementation to determine our ability to deliver corporate-level objectives
  • provide feedback to our Board and Executive Committee on the robustness of the governance, strategies, management and actions associated with our material non-financial issues; and,
  • ensure we report the issues that our stakeholders are interested in.
Internal verification

We have a formalised approach, which describes the basis for reporting National Grid's non-financial performance data. It focuses on the key principles and practices, describes: 

  • the scope of the Company's non-financial performance data
  • our non-financial performance reporting boundaries and year
  • how acquisitions and disposals are treated
  • how we decide what non-financial performance data to report
  • how our non-financial performance data is verified before publication
  • what records should be kept.

Our individual business data owners are responsible for internally verifying the various non-financial reporting data and providing the supporting narrative needed to explain trends or material changes in the data.

Our Corporate Affairs department is responsible for ensuring data and, where applicable, supporting narrative has been internally verified before disclosure and for checking the robustness and completeness of the verification evidence.

External verification of climate change data

Reflecting the significance of climate change to our business, in 2012 for the first time we engaged an independent auditor, WSP Environmental & Energy, to verify our scope 1 and 2 emissions.

WSP completed its seventh annual verification of our GHG data in June 2019. Please refer to the 2018/19 greenhouse gas emissions verification statement for the key findings.

View greenhouse gas verification 2018/19

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Defining our priorities

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Our performance

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