Voting Rights and Capital Update

11 January 2024

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

Voting Rights and Capital Update

National Grid confirms that, following the issue of 31,477,272 ordinary shares earlier today in relation to the operation of the Scrip Dividend Scheme for the 2023/24 interim dividend, National Grid's registered capital consists of 3,967,138,214 ordinary shares, of which 247,435,691 shares are held as treasury shares; leaving a balance of 3,719,702,523 shares with voting rights.

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The figure of 3,719,702,523 may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, National Grid plc under the Financial Conduct Authority's Disclosure and Transparency Rules.

The current terms and conditions of the scrip dividend scheme are available in the Investors section on the Company's website and from Equiniti on 0800 169 7775 or help.shareview.co.uk.

Pritti Patel

Deputy Company Secretary & General Counsel, Corporate