Holding(s) in Company

Informa PLC
09 November 2005



             NOTIFICATION OF MAJOR INTERESTS IN SHARES


1)   NAME OF LISTED COMPANY

INFORMA PLC

2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST

LEGAL & GENERAL INVESTMENT MANAGEMENT

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

AS 2 ABOVE


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.

1,065,000

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

0.25%

7)   Number of shares/amount of stock disposed

NOT KNOWN

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

NOT KNOWN

9)   Class of security

ORDINARY SHARES OF 10 PENCE EACH

NOT KNOWN

11)  Date listed company informed

8 NOVEMBER 2005

12)  Total holding following this notification

43,058,973
               
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)

10.22%

14)  Any additional information



15)  Name of contact and telephone number for queries

ANDREA CALLABY - TEL: [phone]

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

ANDREA CALLABY, DEPUTY COMPANY SECRETARY


Date of Notification .............   9 NOVEMBER 2005  ...........





Letter to: Informa Group Plc


Disclosure of Interest in shares Under Section 198 Companies Act 1985


Please find below the details of the notifiable interest of Legal & General
Investment Management in the relevant share capital of your company:


Material Interest

HSBC Nominees Ltd A/c 914945                                   149,716
HSBC Nominees Ltd A/c 923363                                   814,256
HSBC Nominees Ltd A/c 775337                                   328,565
HSBC Global Custody Nominee (UK) Ltd A/c 942199              1,875,000
HSBC Global Custody Nominee (UK) Ltd A/c 942229              1,759,844
HSBC Global Custody Nominee (UK) Ltd A/c 942217              1,774,897
HSBC Global Custody Nominee (UK) Ltd A/c 942205              1,610,859
HSBC Global Custody Nominee (UK) Ltd A/c 942175              1,734,914
HSBC Global Custody Nominee (UK) Ltd A/c 942187              1,797,293
HSBC Nominees Ltd A/c 775245                                 1,505,663
HSBC Nominee Ltd A/c 130007                                    386,260
HSBC Nominees Ltd A/c 770286                                   415,800
HSBC Nominees Ltd A/c 357206                                 9,970,116
HSBC Nominees Ltd A/c 866203                                   720,502
HSBC Nominees Ltd A/c 916681                                    21,000
HSBC Nominees Ltd A/c 969995                                   963,969
HSBC Nominees Ltd A/c 754612                                 3,998,678
HSBC Nominees Ltd A/c 361602                                    95,760
HSBC Nominees Ltd A/c 282605                                 4,530,611
HSBC Nominees Ltd A/c 360509                                   622,074
HSBC Nominees Ltd A/c 766793                                   703,031
HSBC Nominees Ltd A/c 924434                                   193,002
HSBC Nominees Ltd A/c 924422                                   774,784
Northern Trust A/c SVV01                                       271,380
Chase Nominees A/c 39182                                        71,000
Northern Trust A/c SVB01                                        92,576
Northern Trust A/c SVH01                                        12,772
Northern Trust A/c LBN02                                         5,152
HSBC Nominees Ltd A/c 881071                                    14,336
HSBC Nominees Ltd A/c 748558                                    12,220
ABN Amro Mellon (Nom) Ltd A/c SKBF9999002                      630,993
Nortrust Nominees A/c LGD01                                  2,252,517             
Nortrust Nominees A/c LGQ01                                    622,223
Nortrust Nominees A/c LGR01                                    475,352
Nortrust Nominees A/c LGG01                                     97,949
Nortrust Nominees A/c LGL01                                    829,975
Nortrust Nominees A/c LGB01                                     29,443
Nortrust Nominees A/c LGU01                                    675,000
Citibank, London A/c 6008054495                                 69,888
Citibank, London A/c 6008754888                                 60,835
Nortrust Nominees A/c LLV01                                     56,426
Northern Trust A/c CNF01                                        32,342

                                                            43,058,973   10.22%


We currently have a notifiable interest in 43,058,973 Ordinary 10p shares we
understand represents 10.22% of that class of your share capital calculated on
an issued share capital of 421,274,304 Ordinary 10p shares.


Letter from Legal & General Investment Management Limited




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