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:

TalkTalk Telecom Group Plc

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

An acquisition or disposal of voting rights

X

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:

FIL Limited

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

See attached schedule

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

3 March 2011

6. Date on which issuer notified:

4 March 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 usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights

Indirect

Direct

Indirect

Direct

Indirect

GB00B4YCDF59

 49,075,883

 49,075,883

 45,331,791

45,331,791

4.95

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate

Exercise/ConversionPeriod

Number of votingrights that may beacquired if theinstrument isexercised/ 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

 45,331,791

 4.95

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

See attached schedule

Proxy Voting:

10. Name of the proxy holder:

FIL Limited

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

3,744,092

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

3 March 2011

13. Additional information:

None

14. Contact name:

Robert Crayston

15. Contact telephone number:

[email protected] 01737 836 241

Issuer name:

TALKTALK TELECOM GROUP PLC

Current ownership percentage:

4.95%

Total shares held:

45,331,791

Issued share capital:

914,108,245

SHARES HELD

NOMINEE

MANAGEMENT COMPANY

FIL Limited (FIL) is the parent

1,031,600

BANK OF NEW YORK BRUSSELS

FPM

holding company for various direct and indirect

281,700

BANK OF NEW YORK EUROPE LDN

FIL

subsidiaries, including FIL Fund Management

5,035,183

BROWN BROS HARRIMN LTD LUX

FIL

Limited (FFML), FIL Investment Services Ltd

517,400

BROWN BROTHERS HARRIMAN AND CO

FIJ

(FISL), FIL Gestion (FIGEST), FIL

193,300

CHASE MANHTTN BK AG FRNKFRT (S

FPM

Asset Management (Korea) Limited (FIAKL),

2,992,114

JP MORGAN, BOURNEMOUTH

FII

FIL Investments Management (Hong Kong)

2,460,900

JP MORGAN, BOURNEMOUTH

FIL

Limited (FIMHK), FIL Pension Management

26,018,731

JP MORGAN, BOURNEMOUTH

FISL

(FPM), Fidelity Investments Japan (FIJ) and FIL

147,300

NORDDEUTSCHE LANDERSBANK

FIL

Investments International (FII), investment managers

1,119,700

NORTHERN TRUST LONDON

FIL

for various non-US investment companies and

1,479,400

NORTHERN TRUST LONDON

FPM

institutional clients.

444,400

STATE STR BK AND TR CO LNDN (S

FIL

926,000

STATE STREET HONG KONG

FIA(K)L

3,086

BROWN BROS HARRIMN LTD LUX (C)

FIL

206,277

JP MORGAN, BOURNEMOUTH (C)

FIL

1,713,400

MASTER TRUST BANK OF JAPAN (C)

FIJ

141,100

STATE STR BK AND TR CO LNDN (C

FIL

334,900

CITIBANK NA, HONG KONG BR (S)

FIL

285,300

MELLON BANK NA (S)

FIL