Holding(s) in Company

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: Lloyds Banking Group plc 4. Full name of shareholder(s) (if different from 3.): See Section 9 5. Date of the transaction (and date on which the threshold is crossed or reached if different): 24 JUNE 2009 6. Date on which issuer notified: 25 JUNE 2009 7. Threshold(s) that is/are crossed or reached: Direct/Indirect decrease to below 6% 8. Notified details: …………….. A: Voting rights attached to shares Class/type of shares if possible Situation previous to the using the ISIN CODE Triggering transaction Number of shares Number of voting Rights Ord £1 Shares 19,148,086 19,148,086 GB00B3WK5475 Resulting situation after the triggering transaction Class/type of shares if possible Number of Number of voting % of voting using the ISIN CODE shares rights rights Direct Direct Indirect Direct Indirect Ordinary Shares 1,913,184 1,913,184 14,475,436 0.692 5.237 GB00B3WK5475 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 16,388,620 5.93 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: 11,843,484 shares (4.285%) are held by State Street Nominees Ltd. Shares are under the control of Scottish Widows Investment Partnership Ltd, a wholly owned subsidiary of Scottish Widows Group Ltd, a wholly owned subsidiary of Lloyds TSB Bank plc, a wholly owned subsidiary of Lloyds Banking Group plc (Indirect Interests). 4,286,235 shares (1.551%) are under the control of Insight Investment Management (Global) Limited, a wholly owned subsidiary of Insight Investment Management Limited, a wholly owned subsidiary of HBOS Insurance & Investment Group Limited, a wholly owned subsidiary of HBOS plc, a wholly owned subsidiary of Lloyds Banking Group plc (Indirect Interests). 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: N/A 14. Contact name: RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP PLC 15. Contact telephone number: + 44 (0) 20 7822 0000

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