Holding(s) in Company

TR-1: Notification of Major Interest in Shares

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: 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 thenotification 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 onwhich the threshold is crossed orreached: v

26 September 2011

6. Date on which issuer notified:

27 September 2011

7. Threshold(s) that is/are crossed orreached: vi, vii

See item 13

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

GB00B19DVX61

81,483,351

81,483,351

81,374,443

81,038,909

335,534

9.97%

0.04%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

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

Resulting situation after the triggering transaction

Type of financialinstrument

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

81,374,443

10.01%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial 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)

M&G Securities 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 ceaseto hold:

N/A

12. Date on which proxy holder will cease to holdvoting rights:

N/A

13. Additional information:

M&G Group Limited (wholly owned subsidiary of M&G Limited) and M&G Limited has moved below a 10% notifiable interest triggering this notification.

14. Contact name:

Steve Devany

15. Contact telephone number:

020 3155 1301

HOLDING

% Total Notification of Interests

PRUDENTIAL PLC

81,374,443

10.01

REGISTERED HOLDER

Direct

NORTRUST NOMINEE LTD A/C MHF01

181,944

NORTRUST NOMINEE LTD A/C MHJ01

774,991

NORTRUST NOMINEE LTD A/C MKB01

263,842

NORTRUST NOMINEE LTD A/C MKK01

40,400,994

NORTRUST NOMS LTD

92,583

NORTRUST NOMS LTD A/C PUF01

1,000,000

NORTRUST NOMS LTD A/C PUR01

141,896

PRUCLT HSBC GIS NOM(UK) PAC AC

31,732,158

PRUCLT HSBC GIS NOM(UK) PPL AC

707,146

PUT UK GROWTH QIS

5,743,355

Indirect

JP MORGAN NOMINEES

241,334

STATE STREET NOMS

94,200

HOLDING

% Total Notification of Interests

M&G GROUP LIMITED

81,133,109

9.99

REGISTERED HOLDER

Direct

NORTRUST NOMINEE LTD A/C MHF01

181,944

NORTRUST NOMINEE LTD A/C MHJ01

774,991

NORTRUST NOMINEE LTD A/C MKB01

263,842

NORTRUST NOMINEE LTD A/C MKK01

40,400,994

NORTRUST NOMS LTD

92,583

NORTRUST NOMS LTD A/C PUF01

1,000,000

NORTRUST NOMS LTD A/C PUR01

141,896

PRUCLT HSBC GIS NOM(UK) PAC AC

31,732,158

PRUCLT HSBC GIS NOM(UK) PPL AC

707,146

PUT UK GROWTH QIS

5,743,355

STATE STREET NOMS

94,200

HOLDING

% Total Notification of Interests

M&G INVESTMENT MANAGEMENT LIMITED

80,951,165

9.96

REGISTERED HOLDER

Direct

NORTRUST NOMINEE LTD A/C MHJ01

774,991

NORTRUST NOMINEE LTD A/C MKB01

263,842

NORTRUST NOMINEE LTD A/C MKK01

40,400,994

NORTRUST NOMS LTD

92,583

NORTRUST NOMS LTD A/C PUF01

1,000,000

NORTRUST NOMS LTD A/C PUR01

141,896

PRUCLT HSBC GIS NOM(UK) PAC AC

31,732,158

PRUCLT HSBC GIS NOM(UK) PPL AC

707,146

PUT UK GROWTH QIS

5,743,355

STATE STREET NOMS

94,200

M&G LIMITED

HOLDING

% Total Notification of Interests

81,133,109

9.99

REGISTERED HOLDER

Direct

NORTRUST NOMINEE LTD A/C MHF01

181,944

NORTRUST NOMINEE LTD A/C MHJ01

774,991

NORTRUST NOMINEE LTD A/C MKB01

263,842

NORTRUST NOMINEE LTD A/C MKK01

40,400,994

NORTRUST NOMS LTD

92,583

NORTRUST NOMS LTD A/C PUF01

1,000,000

NORTRUST NOMS LTD A/C PUR01

141,896

PRUCLT HSBC GIS NOM(UK) PAC AC

31,732,158

PRUCLT HSBC GIS NOM(UK) PPL AC

707,146

PUT UK GROWTH QIS

5,743,355

STATE STREET NOMS

94,200

-------

HOLDING

% Total Notification of Interests

The Prudential Assurance Company Limited

32,439,304

3.99

REGISTERED HOLDER

Direct

PRUCLT HSBC GIS NOM(UK) PAC AC

31,732,158

PRUCLT HSBC GIS NOM(UK) PPL AC

707,146