Holding(s) in Company

Informa PLC
14 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                                NO
result in the acquisition 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      11 APRIL 2008
threshold is crossed or reached if different):


6. Date on which issuer notified:                  14 APRIL 2008


7. Threshold(s) that is/are crossed or reached:    5%


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 rights  Percentage of voting
If possible use   shares       voting       shares                                 rights
ISIN code                      rights
                                                          Direct       Indirect    Direct    Indirect

GB0002625654      20,007,418   20,007,418   21,753,437    15,416,732   6,336,705   3.628%    1.491%




B: Financial Instruments

Resulting situation after the triggering transaction

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






Total (A+B)


Number of voting rights                              Percentage of voting rights


21,753,437                                           5.119%


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:                           [phone]




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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