Holding(s) in Company

SMG PLC
20 December 2007



TR-1: notification of major interests in shares

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


2.  Reason for notification (yes/no)
                                                                      
    An acquisition or disposal of voting rights                            YES

    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 obligation:                 

    D.C. Thomson & Company Limited               


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


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

    19 December 2007


6.  Date on which issuer notified:                         

    20 December 2007


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

    3.870%


8.  Notified details:

A:  Voting rights attached to shares

Class/    Situation previous to the Resulting situation after the triggering 
type of   Triggering transaction    transaction
shares
if
possible
using     Number of  Number of      Number of  Number of           % of voting
the ISIN  Shares     Voting         shares     votingrights        rights
CODE                 Rights
                                    Direct     Direct     Indirect Direct  Indirect

Ord GBP   7,000,000  7,000,000      36,798,936 36,798,936    -     3.870%      -
0.025


B:  Financial Instruments

Resulting situation after the triggering transaction
Type of     Expiration  Exercise/     Number of voting rights that may   % of
financial   date        Conversion    be acquired if the instrument is   voting
instrument              Period/ Date  exercised/ converted.              rights

    -          -             -                   -                         -

Total (A+B)
Number of voting rights                  % of voting rights

36,798,936                               3.870%


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



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:      

    Notification using the total voting rights figure of 950,853,218.
                                   
    Following acquisition of 29,798,936 shares on 19 December 2007.


14. Contact name:                          

    Jane E A Tames
    Company Secretary


15. Contact telephone number:                                              
    
    0141 300 3074




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