Holding(s) in Company

Posted 23 March 2007
Invensys PLC
23 March 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                                                      (X)

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                                                 (  )

3. Full name of person(s) subject to the notification               Legal & General Group Plc (Group)
obligation:
                                                                  Legal & General Investment Management
                                                                              Limited (LGIM)

4. Full name of shareholder(s) (if different from 3.):               Legal & General Group Plc (L&G)
                                                                   Legal & General Assurance (Pensions
                                                                        Management) Limited (PMC)

5. Date of the transaction and date on which the threshold is                   21/03/2007
crossed or reached:

6. Date on which issuer notified:                                               22/03/2007

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

8. Notified details:


A: Voting rights attached to shares
Class/type of    Situation previous to Resulting situation after the triggering transaction
shares           the Triggering
                 transaction
 if possible     Number of  Number of  Number of     Number of voting rights    % of voting rights
using the ISIN   Shares     Voting     shares
CODE                        Rights     Direct        Direct       Indirect      Direct     Indirect
Ord GBP          Below 5%              33,586,668     33,586,668    7,077,979  4.218              0.888

0.10


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



Total (A+B)
Number of voting rights                           % of voting rights
                   
40,664,647                                        5.10


9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively
held, if applicable:
Legal & General Group Plc (Direct and Indirect) (Group) (40,664,647 - 5.10%
= Total Position)
Legal & General Investment Management (Holdings) Limited (LGIMH) (Direct and
Indirect) (40,664,647 - 5.10% = Total Position)
Legal & General Investment Management Limited (Indirect) (LGIM) (40,664,647
- 5.10% = Total Position)
                    Legal & General Group Plc (Direct) (L&G) (33,586,668 - 4.21% = LGAS, LGPL & PMC)
Legal & General Investment Management (Holdings) Limited        Legal & General Insurance Holdings Limited (Direct)
(Direct) (LGIMHD) (24,891,139 - 3.12% = PMC)                    (LGIH)
Legal & General Assurance (Pensions Management) Limited         Legal & General Assurance Society Limited  (LGAS & LGPL)
(24,891,139 - 3.12% = PMC)
                                                                Legal & General Pensions Limited (Direct)  (LGPL)


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:                   Notification using the total voting rights figure of 796,232,100
14. Contact name:                                      Steve Devany, Vice President - Communications
15. Contact telephone number:                                          020 7821 3758






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