Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

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

BETFAIR GROUP PLC

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

An acquisition or disposal of voting rights

ü

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

Other (please specify):

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

FMR LLC

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

See attached schedule.

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

1 March 2012

6. Date on which issuer notified:

5 March 2012

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

5%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Indirect

Direct xi

Indirect xii

Direct

Indirect

GB00B44JTH01

5,529,776

5,529,776

4,985,721

4,985,721

4.81

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

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

Resulting situation after the triggering transaction

Type of financialinstrument

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

4,985,721

4.81%

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

FMR LLC is the parent holding company of Fidelity Management & Research Company (FMRCO), investment

manager for US mutual funds, FIL Management Trust Company (FMTC), Pyramis Global Advisors Trust Company

(PGATC), a US state chartered bank which acts as a trustee or investment manager of various pension and trust accounts Pyramis Global Advisors LLC (PGALLC) and Pyramis Trust Company (PTC).

Proxy Voting:

10. Name of the proxy holder:

FMR LLC

11. Number of voting rights proxy holder will dispose:

544,055

12. Date on which proxy holder will dispose of voting rights:

1 March 2012

13. Additional information:

14. Contact name:

Sally-Ann Hatton / 01737 837148

15. Contact telephone number:

[email protected]

Issuer name:

BETFAIR GROUP PLC

Current ownership percentage:

4.81%

Total shares held:

4,985,721

Issued share capital:

103,576,926

SHARES HELD

NOMINEE

MANAGEMENT COMPANY

FMR LLC is the parent holding company of Fidelity

1,952,465

BROWN BROTHERS HARRIMAN AND CO

FMR

Management & Research Company (FMRCO), investment

83,791

JPMORGAN CHASE BANK

FMR

manager for US mutual funds, FIL Management Trust

1,422,195

NORTHERN TRUST CO

FMR

Company (FMTC), Pyramis Global Advisors Trust Company

1,527,270

CITIBANK NA (C)

FMR

(PGATC), a US state chartered bank which acts as a trustee

or investment manager of various pension and trust accounts

Pyramis Global Advisors LLC (PGALLC) and

Pyramis Trust Company (PTC).