Holding(s) in Company

Informa PLC 03 October 2007 TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES (1). Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached (ii): 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 (iii): Aviva plc & its subsidiaries 4. Full name of shareholder(s) (if different from 3.) (iv): Registered Holder: BNY Norwich Union Nominees Limited 3,458,371* Chase GA Group Nominees Limited 9,850,329* Chase Nominees Limited 706,239* CUIM Nominee Limited 3,108,948* *denotes direct interest Chase Nominees Limited 1,317,030 CUIM Nominee Limited 337,419 Vidacos Nominees Limited 3,328,243 5. Date of the transaction and date on which the threshold is crossed or reached if different) (v): 02 October 2007 6. Date on which issuer notified: 03 October 2007 7. Threshold(s) that is/are crossed or reached: 4% to 5% Change at Combined Interest level 8. Notified details: A: Voting rights attached to shares Class/type of shares Situation previous to the Triggering if possible using the transaction (vi) ISIN CODE Number of shares Number of voting Rights (viii) Ordinary Shares GB0002625654 21,190,104 21,190,104 Resulting situation after the triggering transaction (vii) Class/type of shares Number of shares Number of voting rights % of voting rights (ix) if possible using the ISIN CODE Direct Direct (x) Indirect (xi) Direct Indirect Ordinary Shares GB0002625654 17,123,887 17,123,887 4,982,692 4.04% 1.17% B: Financial Instruments Resulting situation after the triggering transaction (xii) Type of Expiration Date Exercise/Conversion Number of voting % of voting financial (xiii) Period/ Date (xiv) rights that may be rights instrument acquired if the instrument is exercised/ converted. N/A Total (A+B) Number of voting rights % of voting rights 22,106,579 5.21% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable (xv): See Section 4 Proxy Voting: 10. Name of the proxy holder: See Section 4 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: Figures are based on a total number of voting rights of 424,610,945. 14. Contact name: Neil Whittaker 15. Contact telephone number: 01603 684420 This information is provided by RNS The company news service from the London Stock Exchange

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