Holding(s) in Company

TR-1: Notifications of Major Interests in Shares

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Informa plc

2. Reason for notification (yes/no)

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached 

An event changing the breakdown of voting rights

Other (please specify):______________

3. Full name of person(s) subject to notification obligation:

Prudential plc group of companies

4. Full name of shareholder(s) (if different from 3):

See appendix below

5. Date of transaction (and date on which the threshold is crossed or reached if different):

21 May 2008

6. Date on which issuer notified:

22 May 2008

7. Threshold(s) that is/are crossed or reached:

See item 13

8: Notified Details

A: Voting rights attached to shares

Class/type of shares

If possible use ISIN code

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of shares

Number of voting rights

Number of shares

Number of voting rights

Percentage of voting rights

Direct

Indirect

Direct

Indirect

GB0002625654

26,361,788

26,361,788

26,861,788

26,861,788

6.32%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ conversion period/date 

No. of voting rights that may be acquired (if the instrument exercised/converted)

Percentage of voting rights

N/A

N/A

N/A

N/A

N/A

Total (A+B)

Number of voting rights

Percentage of voting rights

26,861,788

6.32%

9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively held, if applicable:

Prudential plc (parent Company)

M&G Group Limited (wholly owned subsidiary of Prudential plc)

M&G Limited (wholly owned subsidiary of M&G Group Limited)

M&G Investment Management Limited (wholly owned subsidiary of M&G Limited)

The Prudential Assurance Company Limited (wholly owned subsidiary of Prudential plc)

Proxy Voting:

10. Name of proxy holder:

N/A

11. Number of voting rights proxy holder will cease to hold:

N/A

12. Date on which proxy holder will cease to hold voting rights:

N/A

13. Additional information:

As per 5.1.2, the non-exempt holdings for Prudential plc have crossed 4% triggering this notification.

14 Contact name:

Dipesh Varsani

M&G Investment Management Limited

15. Contact telephone name:

020 7548 3261

Annex: Notification of major interests in shares

A: Identity of the persons or legal entity subject to the notification obligation

Full name 

(including legal form of legal entities)

Informa plc

Contact address 

(registered office for legal entities)

37-41 Mortimer Street

London, W1T 3JH

Phone number & email

020 7017 4314

[email protected]

Other useful information 

(at least legal representative for legal persons)

Julie Wilson

Deputy Company Secretary

B: Identity of the notifier, if applicable

Full name

Contact address

Phone number & email

Other useful information

(e.g. functional relationship with the person or legal entity subject to the notification obligation)

C: Additional information

Registered Holder

Holding

%

Prudential plc

26,861,788

6.32

BK OF NEW YORK(NOMS)LTD/636924

564,692

JP MORGAN NOMINEES

69,334

M&G EUROPEAN SPECIAL SITS FUND

110,074

MAGIM HSBC GIS NOM(UK) SALI

302,947

NORTRUST NOMINEE LTD A/C MHE01

500,000

NORTRUST NOMINEE LTD A/C MHF01

88,238

NORTRUST NOMS LTD

190,237

NORTRUST NOMS LTD A/C MED01

2,450,000

NORTRUST NOMS LTD A/C PUF01

379,906

NORTRUST NOMS LTD A/C PUI01

42,470

NORTRUST NOMS LTD A/C PUR01

4,914,957

PCA EUROPEAN LEADERS EQUITY FD

331,482

PRUCLT HSBC GIS NOM(UK) PAC AC

15,605,248

PRUCLT HSBC GIS NOM(UK) PPL AC

369,674

PRUCLT HSBC GIS NOM(UK)EQBF AC

116,009

PRUCLT HSBC GIS NOM(UK)MNBF AC

160,260

PRUCLT HSBC GIS NOM(UK)PENE AC

666,260

M&G Group Limited

26,227,762

6.17

M&G EUROPEAN SPECIAL SITS FUND

110,074

MAGIM HSBC GIS NOM(UK) SALI

302,947

NORTRUST NOMINEE LTD A/C MHE01

500,000

NORTRUST NOMINEE LTD A/C MHF01

88,238

NORTRUST NOMS LTD

190,237

NORTRUST NOMS LTD A/C MED01

2,450,000

NORTRUST NOMS LTD A/C PUF01

379,906

NORTRUST NOMS LTD A/C PUI01

42,470

NORTRUST NOMS LTD A/C PUR01

4,914,957

PCA EUROPEAN LEADERS EQUITY FD

331,482

PRUCLT HSBC GIS NOM(UK) PAC AC

15,605,248

PRUCLT HSBC GIS NOM(UK) PPL AC

369,674

PRUCLT HSBC GIS NOM(UK)EQBF AC

116,009

PRUCLT HSBC GIS NOM(UK)MNBF AC

160,260

PRUCLT HSBC GIS NOM(UK)PENE AC

666,260

M&G Investment Management Limited

26,139,524

6.15

M&G EUROPEAN SPECIAL SITS FUND

110,074

MAGIM HSBC GIS NOM(UK) SALI

302,947

NORTRUST NOMINEE LTD A/C MHE01

500,000

NORTRUST NOMS LTD

190,237

NORTRUST NOMS LTD A/C MED01

2,450,000

NORTRUST NOMS LTD A/C PUF01

379,906

NORTRUST NOMS LTD A/C PUI01

42,470

NORTRUST NOMS LTD A/C PUR01

4,914,957

PCA EUROPEAN LEADERS EQUITY FD

331,482

PRUCLT HSBC GIS NOM(UK) PAC AC

15,605,248

PRUCLT HSBC GIS NOM(UK) PPL AC

369,674

PRUCLT HSBC GIS NOM(UK)EQBF AC

116,009

PRUCLT HSBC GIS NOM(UK)MNBF AC

160,260

PRUCLT HSBC GIS NOM(UK)PENE AC

666,260

M&G Limited

26,227,762

6.17

M&G EUROPEAN SPECIAL SITS FUND

110,074

MAGIM HSBC GIS NOM(UK) SALI

302,947

NORTRUST NOMINEE LTD A/C MHE01

500,000

NORTRUST NOMINEE LTD A/C MHF01

88,238

NORTRUST NOMS LTD

190,237

NORTRUST NOMS LTD A/C MED01

2,450,000

NORTRUST NOMS LTD A/C PUF01

379,906

NORTRUST NOMS LTD A/C PUI01

42,470

NORTRUST NOMS LTD A/C PUR01

4,914,957

PCA EUROPEAN LEADERS EQUITY FD

331,482

PRUCLT HSBC GIS NOM(UK) PAC AC

15,605,248

PRUCLT HSBC GIS NOM(UK) PPL AC

369,674

PRUCLT HSBC GIS NOM(UK)EQBF AC

116,009

PRUCLT HSBC GIS NOM(UK)MNBF AC

160,260

PRUCLT HSBC GIS NOM(UK)PENE AC

666,260

The Prudential Assurance Company Limited

16,277,869

3.83

MAGIM HSBC GIS NOM(UK) SALI

302,947

PRUCLT HSBC GIS NOM(UK) PAC AC

15,605,248

PRUCLT HSBC GIS NOM(UK) PPL AC

369,674