Articles of Association of National Grid plc as amended by special resolution on 26 July 2021 (Incorporated on 11 July 2000) Ref: L-309674 Table of contents Article Page Introduction ...................................................................................................................................... 1 1 Default Articles and other standard regulations do not apply ......................................... 1 2 The meaning of the Articles ................................................................................................. 1 3 Shareholders’ Liabilities ....................................................................................................... 5 4 Fractions of shares ............................................................................................................... 5 5 The power to reduce capital ................................................................................................. 6 6 Buying back shares .............................................................................................................. 6 7 The special rights of new shares ........................................................................................ 6 8 The Directors’ power to deal with shares ........................................................................... 7 9 Power to pay commission and brokerage .......................................................................... 7 10 No trusts or similar interests recognised ........................................................................... 7 11 Uncertificated shares ............................................................................................................ 8 12 Certificates ............................................................................................................................. 8 13 Replacement share certificates ........................................................................................... 9 14 Changing the special rights of shares .............................................................................. 10 15 More about the special rights of shares ........................................................................... 10 16 Transfer forms ..................................................................................................................... 11 17 Transferring shares in certificated form ........................................................................... 11 18 Refusing to register certain transfers ............................................................................... 11 19 Overseas branch registers ................................................................................................. 12 20 More provisions on uncertificated shares ........................................................................ 12 21 If a shareholder dies ........................................................................................................... 13 22 Registering personal representatives ............................................................................... 13 23 A person who wants to be registered must give notice .................................................. 13 24 Transfers by a person who is automatically entitled to a share by law ........................ 13 25 The rights of people automatically entitled to shares by law ......................................... 14 26 Shareholders who cannot be traced ................................................................................. 14 A43967191 i 27 The Annual General Meeting .............................................................................................. 15 28 Notice of General Meetings ................................................................................................ 15 29 Class meetings .................................................................................................................... 17 30 Moving a General Meeting at short notice ........................................................................ 17 31 Satellite meeting places ..................................................................................................... 18 32 Combined physical and electronic General Meetings .................................................... 19 33 Attending and taking part in General Meetings ............................................................... 20 34 Speaking and voting at General Meetings ........................................................................ 20 35 The chair of a General Meeting .......................................................................................... 20 36 Security and other arrangements at General Meetings .................................................. 21 37 Overflow meeting rooms .................................................................................................... 21 38 The quorum needed for General Meetings ....................................................................... 21 39 The procedure if there is no quorum ................................................................................ 22 40 Adjourning General Meetings ............................................................................................ 22 41 Amending resolutions ........................................................................................................ 23 42 Proxies, Corporate Representatives and Directors speaking at General Meetings ..... 23 43 All votes decided on a poll ................................................................................................. 23 44 How a poll is taken .............................................................................................................. 24 45 Timing of a poll .................................................................................................................... 25 46 The effect of a declaration by the chair ............................................................................ 25 47 The votes of shareholders ................................................................................................. 25 48 Shareholders who owe us money ..................................................................................... 26 49 Votes of shareholders who are of unsound mind ............................................................ 26 50 The votes of joint holders .................................................................................................. 26 51 Suspending shareholder rights on non-disclosure of interest ...................................... 26 52 Completing proxy forms ..................................................................................................... 28 53 Delivering completed proxy forms .................................................................................... 29 54 Cancelling a proxy’s authority ........................................................................................... 30 55 Representatives of companies .......................................................................................... 30 A43967191 ii 56 Challenging votes ............................................................................................................... 30 57 The number of Directors .................................................................................................... 31 58 Qualification to be a Director ............................................................................................. 31 59 Directors’ fees...................................................................................................................... 31 60 Special pay........................................................................................................................... 31 61 Directors’ expenses ............................................................................................................ 31 62 Directors’ pensions and other benefits ............................................................................ 32 63 Appointing Directors to various posts ............................................................................. 32 64 Retiring Directors ................................................................................................................ 33 65 Eligibility for re-election ..................................................................................................... 33 66 Re-electing a Director who is retiring ............................................................................... 33 67 Electing two or more Directors .......................................................................................... 33 68 People who can be Directors ............................................................................................. 33 69 Filling vacancies and appointing extra Directors ............................................................ 34 70 Removing and appointing Directors by an ordinary resolution ..................................... 34 71 When Directors are disqualified ........................................................................................ 34 72 Directors’ meetings ............................................................................................................. 35 73 How Directors’ meetings are called .................................................................................. 35 74 Quorum ...............................................................................................................................