Holding(s) in Company

Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

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

Informa Plc

An acquisition or disposal of voting rights	Yes
An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached.
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments
An event changing the breakdown of voting rights
Other (please specify):

3. Full name of person(s) subject to the notification obligation:	Prudential plc group of companies
4. Full name of shareholder(s) (if different from 3.):	See attached schedule
5. Date of the transaction and date on which the threshold is crossed or reached:	28 June 2011
6. Date on which issuer notified:	29 June 2011
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 using the ISIN CODE
Ordinary GBP 0.001 JE00B3WJHK45

Situation previous to the triggering transaction

Number of Shares	Number of Voting Rights
38,328,226	38,328,226

Resulting situation after the triggering transaction

Number of voting rights

% of voting rights

Number of shares	Direct	Indirect	Direct	Indirect
38,176,697	37,985,759	190,938	6.32%	0.03%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument	Expiration Date	Exercise/ Conversion Period

Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument	Exercise price	Expiration date

Exercise/Conversion period	Number of voting rights instrument refers to

% of voting rights

Nominal	Delta

Total (A+B+C)

Number of voting rights	Percentage of voting rights
38,176,697	6.35%

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 the 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:	The notifiable position has not crossed a disclosable threshold. The notifiable position of 6.35% is an exempt holding under section 5.1.2 of the FSA's DTR Handbook. The trigger for this notification is the movement from 5.00% to 4.97% in the non-exempt holding, which makes up part of the 6.35% notifiable interest.
14. Contact name:	Ryan Dowling / Mark Thomas M&G Investment Management Limited
15. Contact telephone number:	0207 548 3261 / 0207 548 3266

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)	22 Grenville Street, St Helier, Jersey JE4 8PX
Phone number & email	020 7017 4314 [e-mail]
Other useful information (at least legal representative for legal persons)	Emily Martin 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

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