TR-1: Notification of Major Interest in Shares

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: ii

ELECTRONIC DATA PROCESSING PLC

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

X

Other (please specify):

Amendment

3. Full name of person(s) subject to the notification obligation: iii

MICHAEL HELLER

4. Full name of shareholder(s)  (if different from 3.):iv

THE MR. SIMON HELLER SETTLEMENT

5. Date of the transaction and date on which the threshold is crossed or reached: v

27 SEPTEMBER 2010

6. Date on which issuer notified:

27 SEPTEMBER 2010

7. Threshold(s) that is/are crossed or reached: vi, vii

N/A

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type of shares

if possible using the ISIN CODE

Situation previous to the triggering transaction vi

Resulting situation after the triggering transaction vii

Number of Shares

Number of Voting Rights viii

Number of shares

Number of voting rights

% of voting rights x

Direct

Direct x

Indirect xi

Direct

Indirect

3,468,550

3,468,550

2,571,050

2,571,050

897,500

20.52%

7.16%

GB0003101523

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date xiii

Exercise/ Conversion Period xiv

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date xvii

Exercise/ Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

3,468,550

27.68%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: xv:

On 27 September 2010, the Trustees of The Mr Simon Heller Settlement sold 20,000 ordinary shares of 5p each at a price of 45.5p per share to the Trustees of The Simon Heller Charity. Mr Michael Heller, Chairman of Electronic Data Processing PLC, is a trustee of both the Mr Simon Heller Settlement and The Simon Heller Charity.

Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will cease to hold:

12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:

N/A

14. Contact name:

JAMES STOREY

15. Contact telephone number:

0114 262 2011