Holding(s) in Company

SIG PLC 09 November 2007 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: SIG plc 2. Reason for the notification (please state Yes/No): ( ) An acquisition or disposal of voting rights (x) 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 : BlackRock Inc 4. Full name of shareholder(s) (if different from 3.): 5. Date of transaction (and date on which the threshold is crossed or reached if different) : 7 November 2007 6. Date on which issuer notified: 8 November 2007 7. Threshold(s) that is/are crossed or reached : Gone above 5% 8. Notified Details : A: Voting rights attached to shares Class/type of shares Situation previous to the triggering If possible using the transaction ISIN CODE GB0008025412 Number of Shares Number of Voting Rights N/A N/A Voting rights attached to shares Class/type of shares Resulting situation after the triggering If possible using the transaction ISIN CODE Number of Shares Number of Voting Rights % of voting rights Direct Direct Indirect Direct Indirect GB0008025412 N/A N/A 7,030,334 N/A 5.20% B: Financial Instruments Resulting situation after the triggering action Type of Financial Expiration Exercise/ Number of voting % of voting Instrument date Conversion rights that may be rights Period/Date acquired if the Instrument is Exercised/converted Total (A + B) Number of voting rights % of voting rights 7,030,334 5.20% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable : BlackRock Investment Management (UK) Limited - 7,030,334 (5.20%) Proxy Voting: 10. Name of the proxy holder: 11. Number of voting rights proxy holder will cease/acquire to hold: 12. Date on which proxy holder will cease/acquire to hold voting rights: 13. Additional information: 14. Contact Name: Thomas Hone 15. Contact: 020 7743 2098 ANNEX Notification of Major Interests In Shares A. Identity of the person or legal entity subject to the notification obligation Full Name (including legal form for legal entities) BlackRock Inc Contact Address: 33 King William Street London EC4R 9AS Phone Number: 020 7743 2098 Other useful information (at least legal representative for legal persons): This information is provided by RNS The company news service from the London Stock Exchange

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