Holding(s) in Company

Adventis Group PLC
07 March 2007



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

    ADVENTIS GROUP PLC

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

    An acquisition or disposal of voting rights                       ( )

    An acquisition or disposal of financial instruments which may     ( )
    result in the acquisition of shares already issued to which
    voting rights are attached

    An event changing the breakdown of voting rights                  ( )

    Other           Initial notification of Major Interest due to     (X)
    (specify):      change of thresholds as per Transparency
                    Directive - DTR 5.1.2

3.  Full name of person(s) subject to the notification obligation:

    ISIS EP LLP

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

    Clients of ISIS EP LLP (all holdings less than 3%)

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

    n/a

6.  Date on which issuer notified:

    27 February 2007

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

    8%

8.  Notified details:



A. Voting rights attached to shares

Class/type of shares (if possible using the ISIN code) GB00B01G6R56

Situation previous to  Resulting situation after the triggering transaction
   the triggering 
     transaction

Number of  Number of  Number of Number of voting     % of voting rights
Shares     Voting     shares    rights
           Rights
                      Direct    Direct    Indirect   Direct    Indirect

3,508,871  3,508,871  3,508,871 -         3,508,871  -         8.91%


B. Financial Instruments

Resulting situation after the triggering transaction

Type of       Expiration   Exercise/          Number of voting  % of voting
financial     date         Conversion Period/ rights that may   rights
instrument                 Date               be acquired if
                                              the instrument is
                                              exercised/
                                              converted


Total (A+B)

Number of voting rights              % of voting rights

3,508,871                            8.91%

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:     ISIS EP LLP

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

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

13.  Additional information:       -

14:  Contact name:                 Mike Bass, F&C Asset Management plc,
                                   Administrators and Company Secretaries
                                   for ISIS EP LLP

15.  Contact telephone number:     0131 718 1051



Additional information
     Notification received on 6 March 2007




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