Holding(s) in Company

Adventis Group PLC
13 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                                                             ( X)
    (specify):

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

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

5.  Date of the transaction (and date on which the threshold is crossed
    or reached if different):
    8 March 2007 (see note 13)

6.  Date on which issuer notified:
    9 March 2007

7.  Threshold(s) that is/are crossed or reached:
    Below 3%

8.  Notified details:



A. Voting rights attached to shares

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

 Situation previous       Resulting situation after the triggering transaction
 to the triggering
    transaction
Number of   Number of Voting   Number of    Number of Voting    % of voting
Shares      Rights             Shares       Rights              rights
             
                               Direct       Direct   Indirect   Direct  Indirect
1,377,632    1,377,632         Non-         Non-                Below 
                               notifiable   notifiable          3%

B. Financial Instruments


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


Total (A+B)
Number of voting rights              % of voting rights
Non-notifiable                       Below 3%

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:     -

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

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

13.  Additional information:       This disclosure has been made to fulfil
                                   the below FSA requirement:


                                   The Transparency Directive states that
                                   where a major shareholder has not been
                                   required (because of an acquisition or
                                   disposal of voting rights or due to a
                                   change in the total of voting rights in
                                   issue) to make an announcement to the
                                   issuer prior to 20 March 2007, then we
                                   must do so by that date in any event.


                                   In addition to this, please note that
                                   UBS are no longer required to include
                                   prime brokerage holdings in the
                                   disclosures under DTR5 under the
                                   Transparency Directive.

14:  Contact name:                 Angela Huff, Associate Director, UBS AC

15.  Contact telephone number:     020 7568 4981




                      This information is provided by RNS
            The company news service from the London Stock Exchange