Holding(s) in Company

Informa PLC
15 May 2006




             NOTIFICATION OF MAJOR INTERESTS IN SHARES


1)   NAME OF LISTED COMPANY

INFORMA PLC


2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST

FMR CORP AND FIDELITY INTERNATIONAL LIMITED

3)   Please state whether notification indicates that it is 
     regarding the holding of the shareholder named in 2 above;
     in respect of a non-beneficial interest; or in the case of an
     individual holder if it is a holding of that person's spouse
     or children under the age of 18

NON-BENEFICIAL

4)   Name of the registered holder(s) and, if more than one holder, the 
     number of shares held by each of them.

SEE BELOW

5)   Number of shares/amount of stock acquired.

1,364,268

6)   Percentage of issued Class (any treasury shares held by the
     listed company should not be taken into account when
     calculating percentage)

0.32%

7)   Number of shares/amount of stock disposed

N/A

8)   Percentage of issued Class (any treasury shares held by the
     listed company should not be taken into account when
     calculating percentage)

N/A

9)   Class of security

ORDINARY SHARES OF 10 PENCE EACH

10)  Date of transaction

NOT KNOWN

11)  Date listed company informed

15 MAY 2006

12)  Total holding following this notification

34,865,805
               
13)  Total percentage holding of issued class following this notification
     (any treasury shares held by the listed company should not be taken
     into account when calculating percentage)

8.26%

14)  Any additional information

ISSUED SHARE CAPITAL = 422,348,877

15)  Name of contact and telephone number for queries

ANDREA CALLABY 020 7017 4311

16)  Name and signature of duly authorised officer of the listed company
     responsible for making this notification

     Date of Notification ..   15 MAY 2006  ......................



 
Schedule A                                                         Amendment 15

Security: INFORMA PLC

Currant ownership percentage:     8.26%

Total Shares Held                 34,865,805

Shares in issue:                  422,348,877

Change in holdings since 
last filing:                      +1,364,268 ordinary shares

                    MANAGEMENT
  SHARES HELD        COMPANY      NOMINEE/REGISTERED NAME
    2,495,909          FPM        NORTHERN TRUST LONDON
    2,499,192          FPM        JP MORGAN, BOURNEMOUTH
    1,818,462          FPM        BANK OF NEW YORK BRUSSELS
      922,524          FPM        MELLON BANK
      216,000          FPM        CITIBANK LONDON
      100,630          FPM        STATE STR BK AND TR CO LNDN (S
      148,600          FMTC       STATE STREET BANK AND TR CO
       43,700          FMTC       BROWN BROTHERS HARRIMAN AND CO
       33,600          FMTC       JPMORGAN CHASE BANK
   10,644,900          FMRCO      JPMORGAN CHASE BANK
    2,603,200          FMRCO      STATE STREET BANK AND TR CO
      332,400          FMRCO      NORTHERN TRUST CO
    5,256,729          FISL       JP MORGAN, BOURNEMOUTH
    4,479,927          FIL        JP MORGAN, BOURNEMOUTH
      742,560          FIL        BROWN BROS HARRIMN LTD LUX
      444,082          FIL        BANK OF NEW YORK BRUSSELS
      247,440          FIL        STATE STR BK AND TR CO LNDN (S
       32,470          FIL        MORGAN STANLEY LONDON
    1,803,480          FIL        BANK OF NEW YORK EUROPE LDN



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