Holding(s) in Company

Morgan Sindall PLC
09 February 2007

TR1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

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

2     Reason for the notification:         Restatement of historic interest in compliance with the
                                           FSA's new Disclosure and Transparency Rules ('DTR') DTR 5

3     Full name of person(s) subject to    Aviva plc & its subsidiaries
      the notification obligation:

4     Full name of shareholders(s):        Registered holder:
                                           BNY Norwich Union Nominees Limited      485,332*
                                           Chase GA Group Nominees Limited       1,113,160*
                                           Chase Nominees Limited                   98,154*
                                           CUIM Nominee Limited                    387,335*
                                           Kadoorie McAuley International
                                           Limited                                  48,900*

                                           * denotes direct interest

                                           BNY Norwich Union Nominees Limited      148,187
                                           Chase Nominees Limited                   43,922
                                           CUIM Nominee Limited                     36,539
                                           Vidacos Nominee Limited                 697,878
                                           DLI Sustainable Futures Fund             19,019

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

6     Date on which issuer notified:       8 February 2007

7     Threshold(s) that is/are crossed or  N/A
      reached:

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

GB0008085614             3,078,426        2,132,881     945,545      5.02%              2.22%

B:  Financial instruments



Resulting situation after the triggering transaction


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



Total (A+B)

           Number of voting rights                               % of voting rights
                  3,078,426                                             7.24%


9     Chain of controlled undertakings                                    See section 4
      through which the voting rights and/or
      the financial instruments are
      effectively held, if applicable:

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     Aviva plc &its subsidiaries
entities)


Contact address (registered office for legal  Aviva plc
entities)                                     PO Box 89
                                              Surrey Street
                                              Norwich
                                              NR1 3DR

Phone number


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 (eg 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