RNS Number:9836M
Datamonitor PLC
1 July 2003

                  DEALINGS BY SUBSTANTIAL SHAREHOLDERS


1)   NAME OF COMPANY
DATAMONITOR PLC


2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST
REUTERS LIMITED


3)   Please state whether notification indicates that it is in respect of 
     holding of the Shareholder named in 2 above or in respect of a 
     non-beneficial interest or in the case of an individual holder if it is a
     holding of that person's spouse or children under the age of 18
SEE 2 ABOVE


4)   Name of the registered holder(s) and, if more than one holder, the 
     number of shares held by each of them.
AS IN 2 ABOVE


5)   Number of shares/amount of stock acquired.
N/A


6)   ( N/A %) of issued Class


7)   Number of shares/amount of stock disposed
3,518,822


8)   ( 5 %) of issued Class


9)   Class of security
ORDINARY SHARES OF 10P EACH


10)  Date of transaction
27TH JUNE 2003


11)  Date company informed
30 JUNE 2003


12)  Total holding following this notification
10,911,258

               
13)  Total percentage holding of issued class following this notification
15.5%


14)  Any additional information


15)  Name of contact and telephone number for queries
A. GILCHRIST
0207 675 7280


16)  Name and signature of authorised company official responsible for 
     making this notification

     Date of Notification 30/6/2003


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

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