Holding(s) in Company

Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights areof existing shares to which voting rights are attached:attached: ii		INFORMA PLC
2 Reason for the notification (please tick the appropriate box or boxes):
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			No
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments			No
An event changing the breakdown of voting rights			No
Other (please specify):

3. Full name of person(s) subject to the notification obligation:notification obligation: iii	AEGON UK GROUP OF COMPANIES
4. Full name of shareholder(s) (if different from 3.):iv
5. Date of the transaction and date on which the threshold is crossed orwhich the threshold is crossed or reached:reached: v	26th MAY 2010
6. Date on which issuer notified:	27th MAY 2010
7. Threshold(s) that is/are crossed or reached:reached: vi, vii	3%

8. Notified details:
A: Voting rights attached to shares viii, ix
Class/type of sharesshares	Situation previous to the triggeringto the triggering transactiontransaction		Resulting situation after the triggering transaction
if possible using the ISIN CODEthe ISIN CODE	Number ofof SharesShares	Number ofof VotingVoting RightsRights	Number of sharesof shares	Number of voting rightsrights		% of voting rights x
			Direct	Direct xi	Indirect xii	Direct	Indirect
JE00B3WJHK45	17,858,042	17,858,042	16,597,337	16,597,337	1,382,438	2.78%	0.23%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrumentinstrument	Expiration datedate xiii	Exercise/ Conversion PeriodConversion Period xiv	Number of voting rights that may berights that may be acquired if theacquired if the instrument isinstrument is exercised/ converted.exercised/ converted.	% of voting rightsrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financial instrumentinstrument	Exercise price	Expiration date xvii	Exercise/ Conversion periodConversion period xviii	Number of voting rights instrument refers to	% of voting rights xix, xx
Contracts for Difference	n/a	n/a	n/a	63,933	Nominal	Delta
					0.01	1

Total (A+B+C)
Number of voting rights	Percentage of voting rights
18,043,708	3.0%

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

AEGON UK Group of companies - parent undertaking of: AEGON Asset Management UK plc AEGON Investment Management UK ltd. AEGON ICVC

Proxy Voting:
10. Name of the proxy holder:	AEGON UK Group of Companies
11. Number of voting rights proxy holder will cease to hold:to hold:
12. Date on which proxy holder will cease to hold voting rights:voting rights:

13. Additional information:13. Additional information:	AEGON UK Group of Companies consists of: AEGON Asset Management UK plc AEGON Investment Management UK ltd AEGON ICVC
14. Contact name:	Miranda Beacham
15. Contact telephone number:	0131 549 3460

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)	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

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