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Informa PLC 23 August 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 tick the appropriate box or boxes) 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: 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): 22 August 2007 6. Date on which issuer notified: 23 August 2007 7. Threshold(s) that is/are crossed or reached: 5% 8. Notified details: Standard Life Investments Ltd disposed of 486,677 voting rights. A: Voting rights attached to shares Class/type of shares if possible using the ISIN code GB0002625654 Situation prior to the triggering transaction Number of shares Number of voting Rights 21,256,452 21,256,452 Resulting situation after the triggering transaction Number of shares Number of voting rights % of voting rights Direct Direct Indirect Direct Indirect 17,130,681 17,130,681 3,639,094 4.034% 0.857% 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 20,769,775 4.892% 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: Alison Kennedy Corporate Governance Manager - Engagement Standard Life Investments Ltd 15. Contact telephone number: (0131) 245 2289 This information is provided by RNS The company news service from the London Stock Exchange

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