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

Nanoco 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

Gartmore Investment Limited

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

See attached schedule

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

26th April 2010

6. Date on which issuer notified:

28th April 2010

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

11%

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

GB00B01JLR99

20,262,802

20,262,802

18,526,446

18,526,466

10.060%

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

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

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

18,526,466

10.060%

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

Gartmore Fund Managers Limited hold shares on behalf of HSBC Global Custody Nominee UK Ltd

Gartmore Investment Limited hold shares on behalf of Nortrust Nominees Limited, Gartmore Growth Opportunities, Goldman Sachs Nominees Ltd and Vidacos Nominees Ltd A/C 2303.

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: Please direct correspondence to

[email protected]

[email protected]

[email protected]

All figures are based on the Company's issued share capital of 184,156,282 as provided by Exshare

E mail contact [email protected]

14. Contact name:

RDU

15. Contact telephone number:

0207 782 2324