Director/PDMR Shareholding

National Grid PLC 28 March 2008 National Grid plc ('National Grid') 28th March 2008 Directors' interests in National Grid plc (NG.) Ordinary Shares Bob Catell Late yesterday, 27th March 2007, Bob Catell purchased a further 1,000 ADRs (900 of them at $71.38 each and 100 at $71.37 each), equivalent to 5,000 ordinary shares. This takes his total interest to 20,084 ADRs (equivalent to 100,420 ordinary shares) comprised of options over 85,420 shares and a total of 15,000 held beneficially. . Nick Winser Nick Winser has today notified receiving confirmation of the following transactions, which were conducted for personal tax planning purposes: Yesterday, Thursday 27th March 2008, all 62,332 shares registered directly in his name were sold in the market at 717.85p per share. Today, in addition to an existing holding of 638 shares, a further 63,362 shares were purchased by his spouse at 705p per share, increasing her registered holding to 64,000 ordinary shares Nick Winser's total interest after this event is 454,878 comprised of options over 384,941 shares and a total of 69,937 held beneficially. ------------------------------ D C Forward Assistant Secretary 0207 004 3226 This information is provided by RNS The company news service from the London Stock Exchange
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