SSE PLC

Proxy Solicitation & Information Statement • Jun 14, 2024

MR SAM SAMPLE DESIGNATION (IF ANY) MR JOINT HOLDER 1 ADD1 ADD2 ADD3 ADD4

Attendance Card

Additional Holders:

ADDITIONAL HOLDER 1 ADDITIONAL HOLDER 2 ADDITIONAL HOLDER 3 ADDITIONAL HOLDER 4

The Chair of SSE plc invites you to attend the Annual General Meeting of the Company to be held at the Perth Concert Hall, Mill Street, Perth PH1 5HZ on 18 July 2024 at 12.30pm

Shareholder Reference Number: C1234567890

Control Number: 919209

1234

Please see overleaf for instructions on how to vote and explanatory notes. PIN: Please detach this section of the form before posting and bring it to the meeting to gain admittance.

Form of Proxy – Annual General Meeting of SSE plc, 18 July 2024

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SG350

†

Appointment of a representative

1

*000001010101000*

2

Please complete this box only if you wish to appoint a third party proxy other than the Chair. Please leave this box blank if you wish to select the Chair. Do not insert your own name(s).

For the app
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† For the appointment of more than one proxy, please refer to Note 3 overleaf Please mark here to indicate if this proxy appointment is one of multiple appointments being made.

I/We hereby appoint the Chair of the meeting OR the person indicated in the box above as my/our proxy to attend, speak and vote for me/us and on my/our behalf at the Annual General Meeting of SSE plc to be held at the Perth Concert Hall, Mill Street, Perth PH1 5HZ on 18 July 2024 at 12:30pm, and at any adjourned meeting.

Resolutions Please use a black pen. Mark with an X inside the box as shown in this example. X

1.	Receive the Annual Report and Accounts 2024	For	Vote Against Withheld		14. Re-elect Dame Angela Strank	For	Vote Against Withheld
2.	Approve the Remuneration Report 2024				15. Elect Maarten Wetselaar
3.	Declare a fi nal dividend				16. Re-appoint Ernst & Young LLP as Auditor
4.	Re-elect Lady Elish Angiolini			17.	Authorise the Audit Committee to agree the Auditor's remuneration
5.	Re-elect John Bason				18. Receive the Net Zero Transition Report 2024
6.	Re-elect Tony Cocker				19. Authorise the Directors to allot shares
7.	Re-elect Debbie Crosbie				20. Authorise renewal of Scrip Dividend Scheme
8.	Re-elect Helen Mahy				21. Special resolution to disapply pre-emption
9.	Re-elect Sir John Manzoni				rights: general
	10. Elect Barry O'Regan				22. Special resolution to disapply pre-emption rights: specifi c
11.	Re-elect Alistair Phillips-Davies				23. Special resolution to empower the Company to purchase its own Ordinary Shares
	12. Re-elect Martin Pibworth				24. Special resolution to approve 14 days' notice of general meetings
	13. Re-elect Melanie Smith

Authorised Signature

I/We instruct my/our proxy as indicated on this form. Unless otherwise instructed the proxy may vote as he or she sees fit or abstain in relation to any business of the meeting.

Signature Date

3

In the case of a corporation, this proxy must be given under its common seal or be signed on its behalf by an attorney or offi cer duly authorised, stating their capacity / / (e.g. director, secretary).

C1234567890

EX 4 T 2 2 0 1 SNE

6

12XDRH 03

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YOUR VOTE IS IMPORTANT

To be valid, all proxy appointments must be received by the Company's Registrar by 16 July 2024 at 12.30 p.m.

Attending the AGM

or visit www.eproxyappointment.com

For those attending the Annual General Meeting (AGM) in person, details on how to reach the venue, including a location map, can be found on the Contents page in the Notice of AGM and on sse.com .

Shareholders wishing to join the AGM online, can do so by logging on to https://web.lumiagm.com/105991303 and entering their Shareholder Reference Number (SRN) and PIN (see above). The website will open at 12 noon, 30 minutes before the AGM begins. Instructions on how to join via this online platform and participate virtually can be found in Appendix 1 on page 15 of the Notice of AGM.

Explanatory Notes

• 1. The full text of each resolution is set out in the Notice of Annual General Meeting 2024 (Notice of AGM). The Notice of AGM and SSE's Annual Report for 2024 are available on the Company's website, sse.com
• 1. Every shareholder has the right to appoint another person(s) of their choice, who need not be a shareholder of the Company, as their proxy to exercise all or any of their rights, to attend, speak and vote on their behalf at the meeting. If you wish to appoint a person other than the Chair of the meeting, please insert the name of your chosen proxy holder in the space provided in Section 1 on the prior page. If this form is returned without an indication as to how the proxy shall vote on any particular matter, the proxy will exercise their discretion as to whether, and if so how, they vote (or if this proxy form has been issued in respect of a designated account for a shareholder, the proxy will exercise their discretion as to whether, and if so how, they vote).
• 1. To appoint more than one proxy, an additional proxy form(s) may be obtained by contacting the Company's registrar, Computershare Investor Services PLC (the Registrar) on +44 (0)345 143 4005 or you may photocopy this form. Please indicate in the box next to the proxy holder's name the number of shares in relation to which they are authorised to act as your proxy. Please also indicate by ticking the box provided in section 1 on the prior page, if the proxy instruction is one of multiple instructions being given. All forms must be signed and should be returned together in the same envelope.
• 1. The 'Vote Withheld' option is provided to enable you to abstain on any particular resolution. However, it should be noted that a 'Vote Withheld' is not a vote in law and will not be counted in the calculation of the proportion of the votes 'For' and 'Against' a resolution. Place an 'X' in one box only for each resolution.
• 1. Where there are joint holders, the vote of the senior shall be accepted to the exclusion of the votes of the other registered holders of the shares and for this purpose, seniority shall be determined by the order in which the names stand in the Register of Members.
• 1. Details on how shareholders holding shares in uncertifi cated form can vote electronically in advance of the AGM by appointing a proxy through CREST or Proxymity are set out in Note 8 on page 13 of the Notice of AGM.
• 1. Pursuant to regulation 41 of the Uncertifi cated Securities Regulations 2001, entitlement to attend and vote at the meeting and the number of votes which may be cast thereat will be determined by reference to the Register of Members of the Company at close of business on the day which is two days before the day of the meeting (or the adjournment thereof). Changes to entries on the Register of Members after that time shall be disregarded in determining the rights of any person to attend and vote at the meeting.
• 1. To appoint one or more proxies or to give an instruction to a proxy (whether previously appointed or otherwise) via a designated voting platform, any such messages must be received by the Company's Registrar prior to the specifi ed deadline within the relevant system. For this purpose, the time of receipt will be taken to be the time (as determined by the timestamp generated by the relevant designated voting platform) from which the Company's Registrar is able to retrieve the message. The Company may treat as invalid a proxy appointment sent via a designated voting platform in the circumstances set out in Regulation 35(5)(a) of the Uncertifi cated Securities Regulations 2001.
• 1. The address printed on this form is how your address appears on the Register of Members. If this information is incorrect please call the Registrar's helpline on +44 (0)345 143 4005 to request a change of address form or update it online on the Registrar's Investor Centre at www.sse-shares.com .
• 1. Any alterations made to this form should be initialled.
• 1. The completion and return of this form will not preclude a member from attending the meeting and voting in person.

Return the form

Once you have completed the form, return it (together with any power of attorney or other authority under which it is signed or a notarially certifi ed copy thereof) to: Computershare Investor Services PLC, The Pavilions, Bridgwater Road, Bristol BS99 6ZY.

Kindly Note: This form is issued only to the addressee(s) and is specifi c to the unique designated account printed hereon. This personalised form is not transferable between diff erent: (i) account holders; or (ii) uniquely designated accounts. The Company and Computershare Investor Services PLC accept no liability for any instruction that does not comply with these conditions.