29 May 2025

National Grid plc ('National Grid' or the 'Company')

Publication of Annual Report and Accounts and

Notice of 2025 AGM

National Grid announces that the following documents have been published today and are available on its website at https://www.nationalgrid.com/investors/resources/reports-plc:

·    Annual Report and Accounts 2024/25

·    Annual Report on Form 20-F 2024/25

·    Notice of 2025 Annual General Meeting ('AGM')

A copy of each of the Annual Report and Accounts 2024/25, Notice of 2025 AGM and proxy form have been submitted to the Financial Conduct Authority via the National Storage Mechanism and will shortly be available for inspection at https://data.fca.org.uk/#/nsm/nationalstoragemechanism.

In addition, in accordance with Section 203.01 of the New York Stock Exchange Listed Company Manual, the Annual Report on Form 20-F 2024/25 has today been filed with the US Securities and Exchange Commission and will shortly be available at www.sec.gov.

The 2025 AGM of National Grid plc will be held at 11.00am on Wednesday 9 July 2025 at The Ramphal Building, Warwick Conferences, The University of Warwick, Library Road, Coventry, CV4 7AL. The meeting will be held as a hybrid meeting and shareholders can join via the electronic meeting platform or in person. For more information, please refer to the Notice of 2025 AGM and our website at  https://www.nationalgrid.com/investors/shareholder-information/agm.

For the purposes of complying with the Financial Conduct Authority's Disclosure Guidance and Transparency Rules ('DTRs') and the requirements imposed on issuers through the DTRs, information required to be communicated in unedited full text was included in the Annual Report and Accounts 2024/25.

This announcement is made in accordance with DTR 6.3.5R(1A).

Julian Baddeley

Group Company Secretary