Holding(s) in Company

Informa PLC
28 April 2008


TR-1: Notifications of Major Interests in Shares


1. Identity of the issuer or the underlying issuer of         INFORMA PLC
existing shares to which voting rights are attached:


2. Reason for notification (yes/no)


An acquisition or disposal of voting rights                                                  YES


An acquisition or disposal of financial instruments which may result in the acquisition      NO
of shares already issued to which voting rights are attached


An event changing the breakdown of voting rights                                             NO


Other (please specify):______________                                                        NO


3. Full name of person(s) subject to notification    STANDARD LIFE INVESTMENTS LTD
obligation:


4. Full name of shareholder(s) (if different from    VIDACOS NOMINEES
3):


5. Date of transaction (and date on which the        24 APRIL 2008
threshold is crossed or reached if different):


6. Date on which issuer notified:                    25 APRIL 2008


7. Threshold(s) that is/are crossed or reached:      6%


8: Notified Details
A: Voting rights attached to shares


Class/type of      Situation previous to the   Resulting situation after the triggering transaction
shares             triggering transaction
                   Number of     Number of     Number of    Number of voting       Percentage of voting
If possible use    shares        voting rights shares       rights                 rights
ISIN code

                                                            Direct      Indirect   Direct     Indirect
GB0002625654       21,753,437    21,753,437    25,775,503   17,205,996  8,569,507  4.049%     2.017%


B: Financial Instruments


Resulting situation after the triggering transaction


Type of financial    Expiration date      Exercise/ conversion No. of voting rights  Percentage of voting
instrument                                period/date          that may be acquired  rights
                                                               (if the instrument
                                                               exercised/converted)





Total (A+B)


Number of voting rights                              Percentage of voting rights


25,775,503                                           6.066%


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 proxy holder:                            N/A


11. Number of voting rights proxy holder will cease  N/A
to hold:


12. Date on which proxy holder will cease to hold    N/A
voting rights:




13. Additional information:                           N/A


14 Contact name:                                      ALISON KENNEDY
                                                      CORPORATE GOVERNANCE MANAGER - ENGAGEMENT
                                                      STANDARD LIFE INVESTMENTS LTD

15. Contact telephone name:                           0131 245 2289




Annex: Notification of major interests in shares




A: Identity of the persons or legal entity subject to the notification obligation
Full name                                            INFORMA PLC

(including legal form of legal entities)


Contact address                                      37-41 MORTIMER STREET

(registered office for legal entities)               LONDON, W1T 3JH


Phone number & email                                 020 7017 4314

                                                     [e-mail]
Other useful information                             JULIE WILSON

(at least legal representative for legal persons)    DEPUTY COMPANY SECRETARY




B: Identity of the notifier, if applicable
Full name


Contact address


Phone number & email


Other useful information



(e.g. functional relationship with the person or
legal entity subject to the notification obligation)


C: Additional information



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