Holding(s) in Company

TR-1: Notifications 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 Group plc

2: Reason for notification (yes/no)

An acquisition or disposal of voting rights

yes

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

no

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

no

An event changing the breakdown of voting rights

no

Other (please specify):

no

3. Full name of person(s) subject to the notification

obligation:

Aviva plc & its subsidiaries

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

Registered Holder:

BNY (Nominees) Limited 7,698*

BNY Norwich Union Nominees Limited 126,207*

Chase (GA Group) Nominees Limited 764,542*

Chase Nominees Limited 20,309*

Vidacos Nominees Limited 7,690*

*denotes direct interest

Chase Nominees Limited 23,293

Vidacos Nominees Limited 10,533

5. Date of the transaction (and date on which the threshold

is crossed or reached):

06 February 2013

6. Date on which issuer notified:

07 February 2013

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

10% to

8: Notified Details

A: Voting rights attached to shares

Class/type of share If possible use ISIN code

GB0008085614

Situation previous to the triggering transaction

Number of shares

Number of voting rights

4,680,684

4,680,684

Resulting situation after the triggering transaction

Number of shares

Number of voting rights

Percentage ofvoting rights

Direct

Indirect

Direct

Indirect

960,272

926,446

33,826

2.14%

0.08%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ conversion period/date

No. of voting rights that may be acquired(if the instrument exercised/converted)

Percentage of voting rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Exerciseprice

Expirationdate

Exercise/Conversionperiod

Number of votingrights instrumentrefers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

960,272

2.22%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable:

 The voting rights are managed and controlled by Aviva Investors Global Services Limited, with the following chain of controlled undertakings:-

Aviva Investors Global Services Limited:

·; Aviva plc (Parent Company)

·; Aviva Group Holdings Limited (wholly owned subsidiary of Aviva plc)

·; Aviva Investors Holdings Limited (wholly owned subsidiary of Aviva Group Holdings Limited)

·; Aviva Investors Global Services Limited (wholly owned subsidiary of Aviva Investors Holdings Limited)

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 name:

Mary Nettleship, Company Secretary

15. Contact telephone number:

020 7307 9200

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)

Aviva plc & its subsidiaries

Contact address (registered office for legal entities)

Phone number & email

01603 685988

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

B: Identity of the notifier, if applicable

Full name

Michael Dunhill

Contact address

Phone number & email

01603 685988

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

C: Additional information