Holding(s) in Company

Invensys PLC
18 May 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                                                  (  )
Other (please specify):                                                                           (  )

3. Full name of person(s) subject to the notification           Standard Life Investments Ltd
obligation:

4. Full name of shareholder(s) (if different from 3.):          Vidacos Nominees

5. Date of the transaction (and date on which the threshold is  16 May 2007
crossed or reached if different):

6. Date on which issuer notified:                               17 May 2007

7. Threshold(s) that is/are crossed or reached:                 15%

8. Notified details:                                            Standard Life Investments Ltd disposed of
                                                                1,560,000 voting rights.


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           120,354,980 120,354,980  58,220,711     58,220,711   60,574,269  7.312%          7.608%
0.10
GB00B19DVX61


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
118,794,980                                       14.920%


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


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:
14. Contact name:                           Steve Devany, Vice President - Communications
15. Contact telephone number:               020 7821 3758






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