Holding(s) in Company

Informa PLC
21 October 2005




             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 ATTACHED

5)   Number of shares/amount of stock acquired.

1,104,771

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

0.26%

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

20 OCTOBER 2005

12)  Total holding following this notification

25,359,594
               
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)

6.02%

14)  Any additional information

ISSUED SHARE CAPITAL - 421,236,121

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

     JEFF THOMASSON - COMPANY SECRETARY


     Date of Notification .............   21 OCTOBER 2005  ...........




SCHEDULE A                                                       AMENDMENT 11

SECURITY:  INFORMA PLC

Current ownership percentage:                    6.02%

Total Shares Held                                25,359,594

Shares in issue:                                 421,236,121

Change in holdings since last filing:           +1,104,771  ordinary shares

                     SHARES HELD      MANAGEMENT       NOMINEE/REGISTERED
                                        COMPANY        NAME

                 2,634,067                FPM    NORTHERN TRUST LONDON

                 1,964,762                FPM    BANK OF NEW YORK BRUSSELS  

                 1,825,102                FPM    JP MORGAN BOURNEMOUTH

                   866,724                FPM    MELLON BANK

                   516,970                FPM    STATE STR BK AND TR CO LNDN (S

                   128,504                FPM    CLYDESDALE BANK PLC
                    
                    94,400                FPM    CITIBANK LONDON

                    12,800               FMTC    STATE STREET BANK AND TR CO

                 7,756,000              FMRCO    JP MORGAN CHASE BANK 

                 1,147,700              FMRCO    STATE STREET BANK AND TR CO

                    12,200              FMRCO    NORTHERN TRUST CO 

                     9,900              FMRCO    BROWN BROTHERS HARRIMAN AND CO

                 5,037,550               FISL    JP MORGAN BOURNEMOUTH

                   437,763                FIL    BROWN BROS HARRIMN LTD LUX

                   414,150                FIL    JP MORGAN BOURNEMOUTH

                   370,682                FIL    BANK OF NEW YORK BRUSSELS

                   120,340                FIL    STATE STR BK AND TR CO LNDN (S

                 2,009,980                FIL    BANK OF NEW YORK EUROPE LDN



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