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

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:

FIL Limited

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

See schedule below

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

11 November 2010

6. Date on which issuer notified:

15 November 2010

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

 45,362,866

 45,362,866

 46,152,466

46,152,466

5.04

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

 46,152,466

 5.04

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

See schedule below

Proxy Voting:

10. Name of the proxy holder:

FIL Limited

11. Number of voting rights proxy holder will acquire:

789,600

12. Date on which proxy holder will acquire voting rights:

11 November 2010

13. Additional information:

None

14. Contact name:

15. Contact telephone number:

SHARES HELD

NOMINEE

MANAGEMENT COMPANY

FIL Limited (FIL) is the parent holding company for various direct and indirect subsidiaries, including FIL Fund Management Limited (FFML), FIL Investment Services Ltd (FISL), FIL Gestion (FIGEST), FIL Asset Management (Korea) Limited (FIAKL), FIL Investments Management (Hong Kong) Limited (FIMHK), FIL Pension Management (FPM), Fidelity Investments Japan (FIJ) and FIL Investments International (FII), investment managers for various non-US investment companies and institutional clients.

905,500

BANK OF NEW YORK BRUSSELS

FPM

254,100

BANK OF NEW YORK EUROPE LDN

FIL

9,671,325

3,086

661,300

167,500

273,800

2,715,880

2,240,720

23,612,895

165,460

1,516,500

257,000

134,700

1,024,000

1,206,200

151,100

390,600

800,800

BROWN BROS HARRIMN LTD LUX

BROWN BROS HARRIMN LTD LUX (C)

BROWN BROTHERS HARRIMAN AND CO

CHASE MANHTTN BK AG FRNKFRT (S)

CITIBANK NA, HONG KONG BR (S)

JP MORGAN, BOURNEMOUTH

JP MORGAN, BOURNEMOUTH

JP MORGAN, BOURNEMOUTH

JP MORGAN, BOURNEMOUTH (C)

MASTER TRUST BANK OF JAPAN (C)

MELLON BANK NA (S)

NORDDEUTSCHE LANDERSBANK

NORTHERN TRUST LONDON

NORTHERN TRUST LONDON

STATE STR BK AND TR CO LNDN (C)

STATE STR BK AND TR CO LNDN (S)

STATE STREET HONG KONG

FIL

FIL

FIJFPMFILFIIFILFISLFILFIJFILFILFILFPMFILFILFIA(K)L