RNSArticle


TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESⁱ

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: ⁱⁱ		Invensys 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: ⁱⁱⁱ	Prudential plc group of companies
4. Full name of shareholder(s) (if different from 3.):^iv	See attached schedule
5. Date of the transaction and date on which the threshold is crossed or reached: ^v	06 April 2010
6. Date on which issuer notified:	07 April 2010
7. Threshold(s) that is/are crossed or reached: ^{vi, vii}	See item 13

8. Notified details:

A: Voting rights attached to shares ^{viii, ix}

Class/type of
shares

if possible using
the 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

% of voting rights ^x

Direct

Direct ^xi

Indirect ^xii

Direct

Indirect

GB00B19DVX61

81,554,813

81,192,241

80,529,103

663,138

9.978%

0.082%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial
instrument

Expiration
date ^xiii

Exercise/
Conversion Period ^xiv

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 ^{xv, xvi}

Resulting situation after the triggering transaction

Type of financial
instrument

Exercise price

Expiration date ^xvii

Exercise/
Conversion 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

81,192,241

10.06%

9. Chain of controlled undertakings through which the voting rights and/or the 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:		N/A
12. Date on which proxy holder will cease to hold voting rights:		N/A

13. Additional information:	M&G Group Limited (wholly owned subsidiary of Prudential plc), M&G Limited (wholly owned subsidiary of M&G Group Limited) and M&G Investment Management Limited (wholly owned subsidiary of M&G Limited) has dropped below a 10% notifiable interest triggering this notification. Calculations based on a Total Voting Rights figure of 807,059,602.
14. Contact name:	Steve Devany, Head of Corporate Communications
15. Contact telephone number:	020 7821 3758

---------	HOLDING	% Total Notification of Interests
PRUDENTIAL PLC	81,192,241	10.06

REGISTERED HOLDER
NORTRUST NOMINEE LTD A/C MNJ01	429,127
PRUCLT HSBC GIS NOM(UK) PPL AC	5,434,841
NORTRUST NOMS LTD A/C PUR01	7,944,254
NORTRUST NOMS LTD	229,472
NORTRUST NOMS LTD A/C PUF01	541,811
JP MORGAN NOMINEES	523,138
NORTRUST NOMS LIMITED A/C PUS01	38,552
STATE STREET NOMS	140,000
PRUCLT HSBC GIS NOM(UK) PAC AC	30,480,188
NORTRUST NOMS LIMITED A/C PUI01	64,307
NORTRUST NOMINEE LTD A/C MKB01	876,156
NORTRUST NOMINEE LTD A/C MKK01	32,000,000
NORTRUST NOMINEE LTD A/C MNB01	2,308,451
NORTRUST NOMINEE LTD A/C MHF01	181,944

	HOLDING	% Total Notification of Interests
M&G GROUP LIMITED	80,669,103	9.99

REGISTERED HOLDER
NORTRUST NOMINEE LTD A/C MNJ01	429,127
PRUCLT HSBC GIS NOM(UK) PPL AC	5,434,841
NORTRUST NOMS LTD A/C PUR01	7,944,254
NORTRUST NOMS LTD	229,472
NORTRUST NOMS LTD A/C PUF01	541,811
NORTRUST NOMS LIMITED A/C PUS01	38,552
STATE STREET NOMS	140,000
PRUCLT HSBC GIS NOM(UK) PAC AC	30,480,188
NORTRUST NOMS LIMITED A/C PUI01	64,307

Holding(s) in Company