Holding(s) in Company

Informa PLC
29 November 2005


             NOTIFICATION OF MAJOR INTERESTS IN SHARES


1)   NAME OF COMPANY

     INFORMA PLC

2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST

     AVIVA PLC AND ITS SUBSIDIARIES

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

     AS IN 2 ABOVE

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

     MORLEY FUND MANAGEMENT LTD:
     BNY NORWICH UNION NOMINEES LIMITED     4,181,664*
     CHASE GA GROUP NOMINEES LIMITED        3,471,074*
     CHASE NOMINEES LIMITED                   542,000*
     CUIM NOMINEE LIMITED                   4,645,122*

     * DENOTES BENEFICIAL INTEREST

5)   Number of shares/amount of stock acquired.

     233,460

6)   Percentage of issued Class

     0.06%

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

     25 NOVEMBER 2005

11)  Date company informed

     28 NOVEMBER 2005

12)  Total holding following this notification

     12,839,860*

     * BENEFICIAL INTEREST ONLY
               
13)  Total percentage holding of issued class following this notification

     3.05%

14)  Any additional information

     ISSUED SHARE CAPITAL = 421,342,892

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     29 NOVEMBER 2005


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