Holding(s) in Company

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:

William Hill PLC

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

An acquisition or disposal of voting rights

Yes

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 the notification obligation:

Massachusetts Financial Services Company

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

MFS invests in securities of the issuer on behalf of its various mutual funds and institutional account clients

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

30 June 2011

6. Date on which issuer notified:

1 July 2011

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

 5%

8. Notified details:

A: Voting rights attached to shares

Class/type ofshares

If possible using the ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

GB0031698896

35,338,498

35,338,498

34,380,109

4.90%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate

Exercise/ConversionPeriod

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

% of votingrights

-

-

-

-

-

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Exerciseprice

Expirationdate

Exercise/Conversionperiod

Number of votingrights instrumentrefers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

34,380,109

4.90%

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

William Hill PLC - 3169889

Holdings as of 30 June 2011

Percentage

Entity Holding Held

MFS Investment Management (MFS) 3,648,188 0.5202%

MFS Institutional Advisors, Inc (MFSI) 7,416,851 1.0575%

MFS International (MIL) 2,892,270 0.4124%

MFS International (U.K.) Limited (MIL U.K.) 7,682,866 1.0955%

MFS International Management K.K. (MIM K.K.) 6,744,148 0.9616%

MFS Investment Management (Lux) S.A. (MIM Lux) 5,995,785 0.8549%

Notifiable Interest 34,380,109 4.902%

Shares Outstanding 701,341,787

Proxy Voting:

10. Name of the proxy holder:

N/A

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

N/A

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

N/A

13. Additional information:

14. Contact name and address:

Robert Flaherty

500 Boylston Street

Boston, MA 02116

USA

15. Contact telephone number:

617-954-5814