Holding(s) in Company

Holding(s) in Company

For filings with the FSA include the annex
For filings with issuer exclude the annex
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					X
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:notification obligation: iii		PRUDENTIAL PLC GROUP OF COMPANIES
4. Full name of shareholder(s) (if different from 3.):iv		SEE APPENDIX BELOW
5. Date of the transaction and date on which the threshold is crossed orwhich the threshold is crossed or reached:reached: v		6 OCTOBER 2009
6. Date on which issuer notified:		7 OCTOBER 2009
7. Threshold(s) that is/are crossed or reached:reached: vi, vii		SEE ITEM 13

8. Notified details:
A: Voting rights attached to shares viii, ix
Class/type of sharesshares if possible using the ISIN CODEthe ISIN CODE	Situation previous to the triggeringto the triggering transactiontransaction		Resulting situation after the triggering transaction
	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	51,197,035	51,197,035	50,975,689	50,975,689		8.50%

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
					Nominal	Delta

Total (A+B+C)
Number of voting rights	Percentage of voting rights
50,975,689	8.50%

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
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:to hold:		N/A
12. Date on which proxy holder will cease to hold voting rights:voting rights:		N/A
13. Additional information:13. Additional information:	As per 5.1.2, the non-exempt holdings of Prudential plc have dropped below a 6% notifiable interest triggering this notification.As per 5.1.2, the non-exempt holdings of Prudential plc have dropped below a 6% notifiable interest triggering this notification. Calculations based on a Total Voting Rights figure of 599,171,337.
14. Contact name:	Dipesh Varsani / Mark Thomas M&G Investment Management Limited
15. Contact telephone number:	020 7548 3261 / 020 7548 3266

Note: Annex should only be submitted to the FSA not the issuer
Annex: Notification of major interests in sharesxxii
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 [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

Appendix

Notifiable Position for INFORMA PLC

Percentage holdings are calculated using an issued share capital of 595,339,255

	Registered Holder	Holding	%
Prudential plc		50,975,689	8.50
	BK OF NEW YORK(NOMS)LTD/636924	509,751
	JP MORGAN NOMINEES	225,501
	NORTRUST NOMINEE LTD A/C MHE01	400,000
	NORTRUST NOMINEE LTD A/C MHF01	131,912
	NORTRUST NOMINEE LTD A/C MHJ01	766,880
	NORTRUST NOMINEE LTD A/C MKB01	841,076
	NORTRUST NOMS LTD	619,194
	NORTRUST NOMS LTD A/C MED01	1,902,317
	NORTRUST NOMS LTD A/C MXC01	237,340
	NORTRUST NOMS LTD A/C PUF01	585,921
	NORTRUST NOMS LTD A/C PUI01	70,784
	NORTRUST NOMS LTD A/C PUR01	8,641,306
	PCA EUROPEAN LEADERS EQUITY FD	216,864
	PRUCLT HSBC GIS NOM(UK) PAC AC	34,961,356
	PRUCLT HSBC GIS NOM(UK) PPL AC	705,887
	STATE STREET NOMS	159,600
M&G Group Limited		50,240,437	8.38
	NORTRUST NOMINEE LTD A/C MHE01	400,000
	NORTRUST NOMINEE LTD A/C MHF01	131,912
	NORTRUST NOMINEE LTD A/C MHJ01	766,880
	NORTRUST NOMINEE LTD A/C MKB01	841,076
	NORTRUST NOMS LTD	619,194
	NORTRUST NOMS LTD A/C MED01	1,902,317
	NORTRUST NOMS LTD A/C MXC01	237,340
	NORTRUST NOMS LTD A/C PUF01	585,921
	NORTRUST NOMS LTD A/C PUI01	70,784
	NORTRUST NOMS LTD A/C PUR01	8,641,306
	PCA EUROPEAN LEADERS EQUITY FD	216,864
	PRUCLT HSBC GIS NOM(UK) PAC AC	34,961,356
	PRUCLT HSBC GIS NOM(UK) PPL AC	705,887
	STATE STREET NOMS	159,600
M&G Investment Management Limited		49,746,555	8.30
	NORTRUST NOMINEE LTD A/C MHE01	400,000
	NORTRUST NOMINEE LTD A/C MHJ01	766,800
	NORTRUST NOMINEE LTD A/C MKB01	841,076
	NORTRUST NOMS LTD	257,224
	NORTRUST NOMS LTD A/C MED01	1,902,317
	NORTRUST NOMS LTD A/C MXC01	237,340
	NORTRUST NOMS LTD A/C PUF01	585,921
	NORTRUST NOMS LTD A/C PUI01	70,784
	NORTRUST NOMS LTD A/C PUR01	8,641,306
	PCA EUROPEAN LEADERS EQUITY FD	216,864
	PRUCLT HSBC GIS NOM(UK) PAC AC	34,961,356
	PRUCLT HSBC GIS NOM(UK) PPL AC	705,887
	STATE STREET NOMS	159,600
M&G Limited		50,240,437	8.38
	NORTRUST NOMINEE LTD A/C MHE01	400,000
	NORTRUST NOMINEE LTD A/C MHF01	131,912
	NORTRUST NOMINEE LTD A/C MHJ01	766,880
	NORTRUST NOMINEE LTD A/C MKB01	841,076
	NORTRUST NOMS LTD	619,194
	NORTRUST NOMS LTD A/C MED01	1,902,317
	NORTRUST NOMS LTD A/C MXC01	237,340
	NORTRUST NOMS LTD A/C PUF01	585,921
	NORTRUST NOMS LTD A/C PUI01	70,784
	NORTRUST NOMS LTD A/C PUR01	8,641,306
	PCA EUROPEAN LEADERS EQUITY FD	216,864
	PRUCLT HSBC GIS NOM(UK) PAC AC	34,961,356
	PRUCLT HSBC GIS NOM(UK) PPL AC	705,887
	STATE STREET NOMS	159,600
The Prudential Assurance Company Limited		35,667,243	5.95
	PRUCLT HSBC GIS NOM(UK) PAC AC	34,961,356
	PRUCLT HSBC GIS NOM(UK) PPL AC	705,887

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