Vesuvius Regulatory News (VSVS)

1 May 2008 17:33

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

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

COOKSON GROUP PLC

2. Reason for the notification (please state Yes/No):

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:

LEGAL & GENERAL GROUP PLC (GROUP)

LEGAL & GENERAL INVESTMENT MANAGEMENT LIMITED (LGIM)

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

LEGAL & GENERAL ASSURANCE (PENSIONS MANAGEMENT) LIMITED (PMC)

LEGAL & GENERAL GROUP PLC (L&G)

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

30 APRIL 2008

6. Date on which issuer notified:

1 MAY 2008

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

BELOW 5% (GROUP)BELOW 5% (LGIM) 8. Notified details:¢â‚¬¦¢â‚¬¦¢â‚¬¦¢â‚¬¦¢â‚¬¦..

A: Voting rights attached to shares

Class/type of shares if possible Situation previous to the using the ISIN CODE Triggering transaction Number of Number of voting shares Rights ORD GBP 0.10 10,902,125 10,902,125

Resulting situation after the triggering transaction

Class/type of shares if possible using Number of Number of voting % of voting the ISIN CODE shares rights rights Direct Direct Indirect Direct Indirect ORD GBP 0.10 BELOW 5% B: Financial Instruments

Resulting situation after the triggering transaction

Type of Expiration Exercise/ Number of voting rights that may be % of financial Date Conversion acquired if the instrument is voting instrument Period/ Date exercised/ converted. rights N/A Total (A+B)Number of voting % of voting rights rights BELOW 5%

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

Legal & General Group Plc (Direct and Indirect) (Group) (Below 5% = Total Position) Legal & General Investment Management (Holdings) Limited (LGIMH) (Direct and Indirect) (Below 5% = Total Position) Legal & General Investment Management Limited (Indirect) (Below 5% = Total Position) Legal & General Group Plc (Direct) (L&G) (9,886,744 - 4.65 % = LGAS, LGPL & PMC)

Legal & General Investment Management (Holdings) Legal & General Insurance Limited (Direct) (LGIMHD) (8,937,558 - 4.20 % = Holdings Limited (Direct) PMC)

(LGIH)

Legal & General Assurance (Pensions Management) Legal & General Assurance Limited (PMC) (8,937,558 - 4.20 % = PMC)

Society Limited (LGAS & LGPL) Legal & General Pensions Limited (Direct) (LGPL) Proxy Voting: 10. Name of the proxy holder: N/A

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:

SILVANA GLIBOTA-VIGO, COMPANY SECRETARY ASSISTANT, COOKSON GROUP PLC

15. Contact telephone number:

020 7822 0000