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

YES

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

NO

An event changing the breakdown of voting rights

NO

Other (please specify):______________

NO

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

Standard Life Investments Ltd

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

Vidacos Nominees

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

18 June 2008

6. Date on which issuer notified:

19 June 2008

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

7%

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

30,744,121

30,744,121

29,699,386

18,593,609

11,105,777

4.375%

2.613%

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

Total (A+B)

Number of voting rights

Percentage of voting rights

29,699,386

6.989%

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

Standard Life Investments Ltd

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:

N/A

14 Contact name:

Alison Kennedy

Corporate Governance Manager - Engagement

Standard Life Investments Ltd

15. Contact telephone name:

0131 245 2289

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