Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: ii

Adventis 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

No

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

No

An event changing the breakdown of voting rights

No

Other (please specify):

No

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

ISIS EP LLP

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

Baronsmead AIM VCT Plc holds 9.23%

All other Clients hold less than 3%

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

09/11/2009

6. Date on which issuer notified:

11/11/2009

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

10%, 11%, 12%, 13%, 14%, 15% & 16%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type of shares

if possible using the ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights

Number of shares

Number of voting rights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

3,508,871

 (8.2%)

3,508,871

 (8.2%)

7,860,471

16.68%

Ord 10p

GB00B01G6R56

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date xiii

Exercise/  Conversion Period xiv

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

Nil

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date xvii

Exercise/ Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Nil

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

7,860,471

16.68%

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

ISIS EP LLP

Baronsmead AIM VCT plc holds 9.23%

All other Clients hold less than 3%

Registered name: Chase Nominees Limited

Proxy Voting:

10. Name of the proxy holder:

ISIS EP LLP

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:

Karen Huxley

15. Contact telephone number:

020 7506 5643