Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: Thomas Cook Group plc

2. Reason for the notification: An acquisition or disposal of voting rights

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 if different): 23 May 2011

6. Date on which issuer notified: 25 May 2011

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

5%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares: GB00B1VYCH82

Situation previous to the Triggering transaction

§ Number of shares: 42,841,569

§ Number of voting rights: 42,841,569

Resulting situation after the triggering transaction

§ Number of shares direct: N/A

§ Number of voting rights direct: N/A

§ Number of voting rights indirect: 43,240,379

§ Percentage of voting rights direct: N/A

§ Percentage of voting rights indirect: 5.038%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

§ Type of financial instrument: N/A

§ Expiration Date: N/A

§ Exercise/Conversion period: N/A

§ Number of voting rights that may be acquired if the instrument is exercised/ converted: N/A

§ Percentage of voting rights: N/A

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

Resulting situation after the triggering transaction

§ Type of financial instrument: N/A

§ Exercise Price: N/A

§ Expiration Date: N/A

§ Exercise/Conversion period: N/A

§ Number of voting rights instrument refers to: N/A

§ Percentage of voting rights Nominal: N/A

§ Percentage of voting rights Delta: N/A

Total (A+B+C) Number of voting rights: 43,240,379

Percentage of voting rights: 5.038%

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

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: 

15. Contact telephone number:

Name of authorised company official responsible for making this notification:

Derek Woodward

Group Company Secretary

Tel: 020 7557 6415