Holding(s) in Company

Informa PLC
15 November 2005



                           SCHEDULE 10
 
             NOTIFICATION OF MAJOR INTERESTS IN SHARES


1)   NAME OF 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 in respect of 
     holding of the Shareholder named in 2 above or 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.

      5,084,339

6)   Percentage of issued Class

      1.2%

7)   Number of shares/amount of stock disposed

      N/A

8)   Percentage of issued Class

      N/A

9)   Class of security

      ORDINARY SHARES OF 10 PENCE EACH

10)  Date of transaction

      NOT KNOWN

11)  Date company informed

     14 NOVEMBER 2005

12)  Total holding following this notification

     30,443,933
               
13)  Total percentage holding of issued class following this notification

      7.22%

14)  Any additional information

     ISSUED SHARE CAPITAL = 421,314,951

15)  Name of contact and telephone number for queries

     ANDREA CALLABY 020 7017 4311

16)  Name and signature of authorised company official responsible for 
     making this notification   ANDREA CALLABY, DEPUTY COMPANY SECRETARY

     Date of Notification .......15 NOVEMBER 2005.................


The FSA does not give any express of implied warranty as to the accuracy of this
document or material and does not accept any liability for error or omission.
The FSA is not liable for any damages (including, without limitation, damages
for loss of business or loss of profits) arising in contract, tort or otherwise
from the use Of or inability to use this document, or any material contained in
it, or from any action or decision taken as a result of using this document or
any such material.


 SCHEDULE A                                                       AMENDMENT 12

SECURITY:  INFORMA PLC

Current ownership percentage:                    7.22%

Total Shares Held                           30,443,933

Shares in issue:                           421,314,951

Change in holdings since last filing:      +5,084,339  ordinary shares

                     SHARES HELD      MANAGEMENT       NOMINEE/REGISTERED
                                        COMPANY        NAME

                 3,188,367                FPM    NORTHERN TRUST LONDON

                 2,517,002                FPM    JP MORGAN BOURNEMOUTH   

                 2,347,162                FPM    BANK OF NEW YORK BRUSSELS

                   923,124                FPM    MELLON BANK

                   589,270                FPM    STATE STR BK AND TR CO LNDN (S

                   236,100                FPM    CITIBANK LONDON 
                    
                   150,404                FPM    CLYDESDALE BANK PLC

                    21,700                FPM    BANK OF NEW YORK EUROPE LDN

                    73,000               FMTC    STATE STREET BANK AND TR CO

                    31,400               FMTC    BROWN BROTHERS HARRIMAN AND CO

                    25,600               FMTC    JP MORGAN CHASE BANK 
                   
                 8,754,300               FMRCO    JP MORGAN CHASE BANK 
                 
                 1,500,100               FMRCO    STATE STREET BANK AND TR CO

                     9,900               FMRCO    BROWN BROTHERS HARRIMAN AND CO 

                 6,384,909               FISL    JP MORGAN BOURNEMOUTH

                   528,450               FIL     JP MORGAN BOURNEMOUTH
                   
                   448,882               FIL     BANK OF NEW YORK BRUSSELS
       
                   437,763               FIL    BROWN BROS HARRIMN LTD LUX
                                     
                   181,040               FIL    STATE STR BK AND TR CO LNDN (S

                    55,780               FIL    MORGAN STANLEY LONDON

                 2,039,680               FII    BANK OF NEW YORK EUROPE LDN







                      This information is provided by RNS
            The company news service from the London Stock Exchange