Holding(s) in Company

Morgan Sindall PLC
21 December 2007


TR1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

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

    Morgan Sindall plc
            
2   Reason for the notification:

    An acquisition or disposal of voting rights
      
3   Full name of person(s)subject to the notification obligation:

    Aviva plc & its subsidiaries
       
4   Full name of shareholders(s):

    Registered holder:                            
      
    BNY Norwich Union Nominees Limited                      690,928*
    Chase GA Group Nominees Limited                       2,214,317*
    Chase Nominees Limited                                  173,351*
    CUIM Nominee Limited                                    600,993*
    * denotes direct interest                      
      
    Chase Nominees Limited                                   98,442
    CUIM Nominee Limited                                     27,339
    Vidacos Nominees Limited                                964,472
    Delta Lloyd Institutionale Sustainable Futures Fund      11,319
                                                                                                                   
5   Date of the transaction and date on which the threshold is crossed or
    reached:

    20 December 2007
            
6   Date on which issuer notified:

    21 December 2007
     
7   Threshold(s) that is/are crossed or reached:

    10% to 11% change at combined interest level
      
8   Notified details:

A: Voting rights attached to shares

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

GB0008085614   4,377,661                        4,377,661

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

GB0008085614   3,679,589           3,679,589    1,101,572    8.60%    2.58%


B: Financial instruments

Resulting situation after the triggering transaction

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


Total (A+B)

Number of voting rights           % of voting rights

4,781,161                         11.18%


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

Proxy Voting:

10  Name of the proxy holder:     See section 4
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           Mary Nettleship, Company Secretary
    information:

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   Aviva plc and its subsidiaries
for legal entities)

Contact address (registered
office for legal entities)

Phone number                      01603 684420

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

B: Identity of the notifier, if applicable

Full name                         Global Reporting Unit, Aviva Plc
Contact address
Phone number
Other useful information (eg
functional 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
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