National Grid plc ('National Grid')

22 August 2014

Notification of Directors' Interests

- Dividend Reinvestment

Following payment of the National Grid final 2013/14 dividend on 20 August 2014, National Grid received notification on 21 August 2014 that Jonathan Dawson acquired an interest in a total of 790 ordinary shares in National Grid, in London on 20 August 2014, allotted under the terms of the Scrip Dividend Scheme at the Scrip Dividend Reference Price of 836.10p per share to Mrs Anne Dawson.

Following these changes Jonathan Dawson has an interest in 24,790 ordinary shares in National Grid.

This announcement is made pursuant to the Disclosure and Transparency Rule 3.1.4.

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Contact: A Morgan, Assistant Company Secretary

0207 004 3228


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