Holding(s) in Company

Posted 18 September 2007
Invensys PLC
18 September 2007


TR-1:               NOTIFICATION OF MAJOR INTERESTS IN SHARES


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

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

An acquisition or disposal of voting rights

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): A purchase of shares has caused subsidiaries of Prudential plc to       X
cross 5% triggering this notification.

3. Full name of person(s) subject to the notification             Prudential plc group of companies
obligation:

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            13 September 2007
crossed or reached if different):

6. Date on which issuer notified:                                         17 September 2007

7. Threshold(s) that is/are crossed or reached:                                   5%

8. Notified details:




A: Voting rights attached to shares
Class/type of       Situation previous to the   Resulting situation after the triggering transaction
shares              Triggering transaction
                     Number of     Number of       Number of    Number of voting rights     % of voting
(if possible using     Shares    Voting Rights      shares                                    rights
the ISIN CODE)                                      Direct         Direct      Indirect   Direct  Indirect
GB00B19DVX61        40,082,281   40,082,281     41,538,564      41,538,564               5.21%


B: Financial Instruments
Resulting situation after the triggering transaction
 Type of financial   Expiration date   Exercise/ Conversion     Number of voting rights     % of voting
     instrument                            Period/ Date         that may be acquired if        rights
                                                                   the instrument is
                                                                 exercised/ converted.
        N/A          N/A                        N/A            N/A                        N/A


Total (A+B)
Number of voting rights                            % of voting rights
41,538,564                                         5.21%



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




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 Investment Management Limited (Wholly owned subsidiary of M&
                                             G Limited) has reached a 5% notifiable interest triggering this
                                             notification.

14. Contact name:                            Steve Devany
                                             Head of Corporate Communications

15. Contact telephone number:                0207 821 3758


Notifiable Position Report for INVENSYS ORD GBP 0.10 as at 13 September 2007

Percentage holdings are calculated using an issued share capital of 796,393,055
ORD 0.10 shares.
---------
                                               HOLDING           %
PRUDENTIAL PLC                                    41,538,564       5.21 Total notifiable interest

REGISTERED HOLDER
JP MORGAN NOMINEES                                   103,113
MAGIM HSBC GIS NOM(UK) SALI                          330,366
NORTRUST NOMINEE LTD A/C MHF01                       173,302
NORTRUST NOMINEE LTD A/C MHJ01                     1,661,106
NORTRUST NOMINEE LIMITED A/C MKB01                 1,476,529
NORTRUST NOMINEE LIMITED A/C MKK01                 9,503,327
NORTRUST NOMS LIMITED                                168,630
NORTRUST NOMS LTD A/C PUF01                          462,425
NORTRUST NOMS LIMITED A/C PUR01                    5,508,899
PRUCLT HSBC GIS NOM(UK) PAC AC                    19,485,696
PRUCLT HSBC GIS NOM(UK) PPL AC                     1,495,770
PRUCLT HSBC GIS NOM(UK)EQBF AC                       149,856
PRUCLT HSBC GIS NOM(UK)MNBF AC                       192,071
PRUCLT HASB GIS NOM(UK)PENE AC                       827,474




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