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

Serco Group Plc

Sedol 0797379

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

An acquisition or disposal of voting rights

√

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

1Lansdowne Partners International Limited

2Lansdowne Partners Limited being the General Partner of Lansdowne Partners Limited Partnership

3Lansdowne Partners Austria GmbH

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

HSBC Client Holdings UK Ltd

(Registered Shareholder)

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

20/11/13

6. Date on which issuer notified:

22/11/13

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

Direct

Direct xi

Indirect xii

Direct

Indirect

Ordinary Shares

25,179,410

25,179,410

Below 5%

Below 5%

GB0007973794

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

Below 5%

Below 5%

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

Lansdowne Partners International Limited is the parent undertaking of Lansdowne Partners Limited and Lansdowne Partners Austria GmbH. Lansdowne Partners Austria GmbH and Lansdowne Partners Limited Partnership act as discretionary co-investment managers to certain client funds.

Proxy Voting:

10. Name of the proxy holder:

Lansdowne Partners Limited

and

Lansdowne Partners Austria GmbH

11. Number of voting rights proxy holder will ceaseto hold:

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

13. Additional information:

Serco Group plc is disclosing this information in accordance with DTR 5.8.12

14. Contact name:

Sarah Howfield

15. Contact telephone number:

0208 334 4351