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Informa PLC 28 March 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: Informa PLC 2. Reason for the notification (please state Yes/No): ( ) An acquisition or disposal of voting rights: ( ) 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) : ( x ) Initial disclosure under the Financial Services Authority's Disclosure Transparency Rules. 3. Full name of person(s) subject to the notification obligation: Standard Life Investments Ltd 4. Full name of shareholder(s) (if different from 3.): Vidacos Nominees 5. Date of the transaction and date on which the threshold is crossed or reached if different): 23 March 2007 6. Date on which issuer notified: 27 March 2007 7. Threshold(s) that is/are crossed or reached: Direct voting rights exceed 5% and total voting rights exceed 8%. 8. Notified details: Initial disclosure under the Financial Services Authority's Disclosure Transparency Rules A: Voting rights attached to shares Class/type of shares Situation previous to if possible using the the Triggering ISIN CODE transaction Number of shares Number of voting Rights GB0002625654 Initial disclosure Initial disclosure Resulting situation after the triggering transaction Class/type of shares Number of shares Number of voting rights % of voting rights if possible using the ISIN CODE Direct Direct Indirect Direct Indirect GB0002625654 23,756,379 23,756,379 below 3% 5.612% below 3% B: Financial Instruments Resulting situation after the triggering transaction Type of Expiration Date Exercise/Conversion Number of voting % of voting financial Period/ Date rights that may be rights instrument acquired if the instrument is exercised/ converted. Total (A+B) Number of voting rights % of voting rights 34,785,036 8.217% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: Standard Life Investments Ltd 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: John Burton, Company Secretary 15. Contact telephone number: (020) 7017 5000 This information is provided by RNS The company news service from the London Stock Exchange

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