Holding(s) in Company

TR-1: notification of major interests in shares

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

Invensys plc

2. Reason for the notification  (please tick the appropriate box or boxes)

An acquisition or disposal of voting rights 

Χ 

An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

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 if different):

24 September 2008

6. Date on which issuer notified:

25 September 2008

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)

Situation previous to the Triggering transaction 

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights viii

Number of shares

Number of voting rights ix

% of voting rights

Direct

Direct x

Indirect xi

Direct

Indirect

GB00B19DVX61

75,155,811

75,155,811

76,155,811

76,155,811

9.51%

B: Financial Instruments

Resulting situation after the triggering transaction xii

Type of financial instrument

Expiration date xiii

Exercise/ Conversion Period/ Date xiv

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

% of voting rights

N/A

N/A

N/A

N/A

N/A

Total (A+B)

Number of voting rights

% of voting rights

76,155,811

9.51%

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

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 (a 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:

As per 5.1.2, the non-exempt holdings for Prudential plc have crossed 5% triggering this notification.

14. Contact name:

Steve Devany

020 7821 3758

15. Contact telephone number:

020 7821 3758

­­­­­­­­­

HOLDING

% Total Notification of Interests

PRUDENTIAL PLC

76,155,811

9.51

REGISTERED HOLDER

JP MORGAN NOMINEES

1,434,451

MAGIM HSBC GIS NOM(UK) SALI

455,300

NORTRUST NOMINEE LTD A/C MHF01

173,302

NORTRUST NOMINEE LTD A/C MHJ01

2,236,112

NORTRUST NOMINEE LIMITED A/C MKB01

3,410,818

NORTRUST NOMINEE LIMITED A/C MKK01

21,000,000

NORTRUST NOMS LIMITED

277,576

NORTRUST NOMS LTD A/C PUF01

562,022

NORTRUST NOMS LIMITED A/C PUI01

64,310

NORTRUST NOMS LIMITED A/C PUR01

7,416,589

NORTRUST NOMS LIMITED A/C PUS01

44,576

PRUCLT HSBC GIS NOM (UK) PAC AC

32,140,291

PRUCLT HSBC GIS NOM(UK) PPL AC

5,383,888

PRUCLT HSBC GIS NOM(UK) EQBF AC

179,819

PRUCLT HSBC GIS NOM(UK) MNBF AC

241,397

PRUCLT HSBC GIS NOM(UK) PENE AC

995,360

STATE STREET NOMS

140,000

HOLDING

% Total Notification of Interests

M & G GROUP LIMITED

74,721,360

9.33

REGISTERED HOLDER

MAGIM HSBC GIS NOM(UK) SALI

455,300

NORTRUST NOMINEE LIMITED A/C MHF01

173,302

NORTRUST NOMINEE LIMITED A/C MHJ01

2,236,112

NORTRUST NOMINEE LIMITED A/C MKB01

3,410,818

NORTRUST NOMINEE LIMITED A/C MKK01

21,000,000

NORTRUST NOMS LIMITED

277,576

NORTRUST NOMS LIMITED A/C PUF01

562,022

NORTRUST NOMS LIMITED A/C PUI01

64,310

NORTURST NOMS LIMITED PUR01

7,416,589

NORTURST NOMS LIMITED PUS01

44,576

PRUCLT HSBC GIS NOM(UK) PAC AC

32,140,291

PRUCLT HSBC GIB NOM (UK) PPL AC

5,383,888

PRUCLT HSBC GIS NOM (UK)EQBF AC

179,819

PRUCLT HSBC GIS NOM(UK) MNBF AC

241,397

PRUCLT HSBC GIS NOM(UK) PENE AC

995,360

STATE STREET NOMS

140,000

M&G INVESTMENT MANAGEMENT LIMITED

HOLDING

% Total Notification of Interests

74,503,482

9.30

REGISTERED HOLDER

MAGIM HSBC GIS NOM(UK) SALI

455,300

NORTRUST NOMINEE LIMITED A/C MHJ01

2,236,112

NORTRUST NOMINEE LIMITED A/C MKB01

3,410,818

NORTRUST NOMINEE LIMITED A/C MKK01

21,000,000

NORTRUST NOMS LIMITED

277,576

NORTRUST NOMS LIMITED A/C PUF01

562,022

NORTRUST NOMS LIMITED A/C PUI01

64,310

NORTURST NOMS LIMITED PUR01

7,416,589

PRUCLT HSBC GIS NOM(UK) PAC AC

32,140,291

PRUCLT HSBC GIB NOM (UK) PPL AC

5,383,888

PRUCLT HSBC GIS NOM (UK)EQBF AC

179,819

PRUCLT HSBC GIS NOM(UK) MNBF AC

241,397

PRUCLT HSBC GIS NOM(UK) PENE AC

995,360

STATE STREET NOMS

140,000

M&G LIMITED

HOLDING

% Total Notification of Interests

74,721,360

9.33

REGISTERED HOLDER

MAGIM HSBC GIS NOM(UK) SALI

455,300

NORTRUST NOMINEE LIMITED A/C MHF01

173,302

NORTRUST NOMINEE LIMITED A/C MHJ01

2,236,112

NORTRUST NOMINEE LIMITED A/C MKB01

3,410,818

NORTRUST NOMINEE LIMITED A/C MKK01

21,000,000

NORTRUST NOMS LIMITED

277,576

NORTRUST NOMS LIMITED A/C PUF01

562,022

NORTRUST NOMS LIMITED A/C PUI01

64,310

NORTURST NOMS LIMITED PUR01

7,416,589

NORTURST NOMS LIMITED PUS01

44,576

PRUCLT HSBC GIS NOM(UK) PAC AC

32,140,291

PRUCLT HSBC GIB NOM (UK) PPL AC

5,383,888

PRUCLT HSBC GIS NOM (UK)EQBF AC

179,819

PRUCLT HSBC GIS NOM(UK) MNBF AC

241,397

PRUCLT HSBC GIS NOM(UK) PENE AC

995,360

STATE STREET NOMS

140,000

­­­­­­­­­

HOLDING

% Total Notification of Interests

The Prudential Assurance Company Limited

37,979,479

4.74

REGISTERED HOLDER

MAGIM HSBC GIS NOM(UK) SALI

455,300

PRUCLT HSBC GIS NOM(UK) PAC AC

32,140,291

PRUCLT HSBC GIS NOM(UK) PPL AC

5,383,888