Holding(s) in Company

Morgan Sindall PLC
09 February 2007

TR1: NOTIFICATION OF MAJOR INTERESTS IN SHARES


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

2      Reason for the notification:                              Notification of holding at 20 January 2007



3      Full name of person(s) subject to the notification        JP Morgan Chase & Co
       obligation:

4      Full name of shareholders(s):                             JP Morgan Asset Management (UK) Ltd

                                                                 J.P. Morgan Investment Management Inc.

                                                                 JF Asset Management Limited

                                                                 JP Morgan Fleming Asset Management (Japan)
                                                                 Limited

5      Date of the transaction and date on which the threshold   N/A
       is crossed or reached:

6      Date on which issuer notified:                            9 February 2007



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



8      Notified details:



A:  Voting rights attached to shares



Class/type of      Situation previous to the triggering transaction
shares If possible
using the ISIN
code               Number of shares                        Number of voting rights
N/A                N/A                                     N/A

Class/type of      Resulting situation after the triggering transaction
shares If possible
using the ISIN
code               Number of shares           Number of voting rights   % of voting rights
                                              Direct       Indirect     Direct        Indirect
Ordinary shares

GB0008085614       2,574,427                  0            2,574,427    0             6.05%

B:  Financial instruments



Resulting situation after the triggering transaction


Type of financial    Expiration   Exercise/Conversion      Number of voting rights % of voting rights
instrument           date                                  that may be acquired if
                                  Period/Date              the instrument is
                                                           exercised/converted
N/A



Total (A+B)


Number of voting rights                           % of voting rights
2,574,427                                         6.05%


9      Chain of controlled undertakings through      Total disclosure holding for JP Morgan Chase & Co.:
       which the voting rights and/or the financial  2,574,427 voting rights (6.05%)
       instruments are effectively held, if
       applicable:                                   Holdings by controlled undertakings of JP Morgan Chase &
                                                     Co. are as follows:

                                                     JPMorgan Asset Management (UK) Limited: 2,501,438 voting
                                                     rights (5.88%)

                                                     J.P. Morgan Investment Management Inc.

                                                     JF Asset Management Limited

                                                     JP Morgan Fleming Asset Management (Japan) Limited

Proxy Voting:


10     Name of the proxy holder:


11     Number of voting rights proxy holder will
       cease to hold:


12     Date on which proxy holder will cease to hold
       voting rights:



13     Additional information:



14     Contact for further information:              Mary Nettleship



15     Contact telephone number:                     020 7307 9218



Annex to Notification of Major Interests in Shares



A:  Identity of the person or legal entity subject to the notification obligation


Full name (including legal form for legal entities)  JP Morgan Chase & Co


Contact address (registered office for legal         270 Park Avenue
entities)
                                                     New York

                                                     NY10017

Phone number                                         001 212 270 6000


Other useful information (at least legal
representative for legal persons)



B:  Identity of the notifier, if applicable


Full name                                            Mary Nettleship


Contact address                                      Morgan Sindall plc

                                                     77 Newman Street

                                                     London

                                                     W1T 3EW
Phone number                                         020 7307 9218


Other useful information (e.g. functional            Company Secretary
relationship with the person or legal entity subject
to the notification obligation)












                      This information is provided by RNS
            The company news service from the London Stock Exchange