DMTR.L Regulatory News (DMTR)

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

Oxford Advanced Surfaces 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 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 (please specify):

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

Barnard Nominees Limited AC/POWNORA

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

Nora Powell

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

04/06/2010

6. Date on which issuer notified:

04/06/2010

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

6%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares

 if possible using the ISIN CODE

Situation previous to the Triggering transaction

Resulting situation after the triggering transaction

Number of Voting Rights viii

Number of shares

Number of voting rights ix

% of voting rights

Direct x

Indirect xi

Direct

Indirect

Oridinary Share of 1p each

ISIN: GB00B29YYY86

11663220

11663220

12163220

12163220

6.2%

B: Financial Instruments

Resulting situation after the triggering transaction xii

Type of financial instrument

Expiration date xiii

Exercise/ Conversion Period/ Date xiv

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

% of voting rights

Total (A+B)

Number of voting rights

% of voting rights

12,163,220

6.2%

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

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:

14. Contact name:

Michael Barnard

15. Contact telephone number:

01268 493333

A: Identity of the person or legal entity subject to the notification obligation

Full name (including legal form for legal entities)

Contact address (registered office for legal entities)

Phone number

Other useful information (at least legal representative for legal persons)

B: Identity of the notifier, if applicable xvii

Full name

Michael Barnard

Contact address

17-21 New Century Road, Laindon, Basildon SS15 6AG

Phone number

01268 493333

Other useful information (e.g. functional relationship with the person or legal entity subject to the notification obligation)

C: Additional information