Dividend Reinvestment

RNS Number : 2344M

National Grid PLC

21 August 2013

National Grid plc ('National Grid')

21^st August 2013

Notification of Directors' Interests

- Dividend Reinvestment

National Grid earlier today received notification from the Trustee, that Steve Holliday became interested in a total of 1,066 shares held under the National Grid Share Matching Scheme, allotted today under the terms of the National Grid plc Scrip Dividend Scheme (the 'Scheme') at the Scrip Dividend Reference Price of 742.40p per share.

National Grid also received notification of Sir Peter Gershon having received 549 shares into his personal pension, and a further 1,461 shares held by his investment manager, under the terms of the Scheme at the Scrip Dividend Reference Price of 742.40p per share. Also, his ISA manager notified the purchase, today, of 129 shares at 743.7022p.

The Directors total interests after these changes are: