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 TSB GROUP PLC 4. Full name of shareholder(s) (if different from 3.): PERRY NOMINEES LTD BOLTRO NOMINEES LTD WARD NOMINEES LTD LLOYDS BANK (PEP) NOMINEES LTD STATE STREET NOMINEES LTD 5. Date of the transaction (and date on which the threshold is crossed or reached if different): 18 DECEMBER 2007 6. Date on which issuer notified: 19 DECEMBER 2007 7. Threshold(s) that is/are crossed or reached: FALLEN BELOW 3% 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 Number of voting shares Rights BO7V4P8 6,622,871 6,622,871 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 Indirect Direct Indirect BO7V4P8 6,362,506 6,362,506 2.998 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 6,362,506 2.998 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: 46,361 Shares are held by Perry Nominees Ltd, a wholly owned subsidiary of Lloyds TSB Bank Plc, a wholly owned subsidiary of Lloyds TSB Group Plc. 6,761 Shares are held by Boltro Nominees Ltd, a wholly owned subsidiary of Lloyds TSB Bank Plc, a wholly owned subsidiary of Lloyds TSB Group Plc. 426 Shares are held by Ward Nominees Ltd, a wholly owned subsidiary of Lloyds TSB Bank Plc, a wholly owned subsidiary of Lloyds TSB Group Plc. 25,232 Shares are held by Lloyds Bank (Pep) Nominees Ltd, a wholly owned subsidiary of Lloyds TSB Bank Plc, a wholly owned subsidiary of Lloyds TSB Group Plc. 6,283,726 Shares 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 Investment Partnership Group 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 TSB Group Plc. 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: RACHEL FELL, DEPUTY SECRETARY, COOKSON GROUP PLC 15. Contact telephone number: + 44 (0)20 7822 0000

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