Corero Network Regulatory News (CNS)

2 Aug 2010 15:14

For filings with the FSA include the annex For filings with issuer exclude the annex

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

CORERO PLCattached:ii

2 Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights X

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

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments An event changing the breakdown of voting rights

Other (please specify):

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

ROY MITCHELLnotification obligation:iii

4. Full name of shareholder(s)

(if different from 3.):iv

5. Date of the transaction and date on which the threshold is crossed or PURCHASES OF 88999 SHARES

IN JULY 2010reached: v

6. Date on which issuer notified:

29 JULY 2010

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

10%reached: vi, vii 8. Notified details:

A: Voting rights attached to shares viii, ix

Class/ Situation previous Resulting situation after the triggering transaction type of to the triggering shares transaction if Number Number Number Number of voting % of voting rights x possible of of of shares rights using Shares Voting the ISIN Rights CODE Direct Direct xi Indirect xii Direct Indirect 66833 4.4% 155832 155832 10.26%

B: Qualifying Financial Instruments Resulting situation after the triggering transaction

Type of Expiration Exercise/ Number of voting % of voting financial date xiii Conversion Period xiv rights that may be rights instrument acquired if the instrument is exercised/ converted. C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of Exercise price Expiration Exercise/ Number of voting rights % of voting rights financial date xvii Conversion period instrument refers to xix, xx instrument xviii Nominal Delta Total (A+B+C) Number of voting rights Percentage of voting rights 155832 10.26%

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

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: ROY MITCHELL

15. Contact telephone number:

07777 642012

Note: Annex should only be submitted to the FSA not the issuer Annex: Notification of major interests in sharesxxii

A: Identity of the persons or legal entity subject to the notification

obligation Full name

(including legal form of legal entities)

Contact address

(registered office for legal entities)

Phone number & email Other useful information

(at least legal representative for legal persons)

B: Identity of the notifier, if applicable

Full name Contact address Phone number & email Other useful information (e.g. functional relationship with the person or legal entity subject to the notification obligation) C: Additional information

For notes on how to complete form TR-1 please see the FSA website.