RNS Number:2789I
Isotron PLC
4 March 2003


                  DEALINGS BY SUBSTANTIAL SHAREHOLDERS


1)   NAME OF COMPANY

      ISOTRON PLC 

2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST

       LEGAL & GENERAL GROUP PLC

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

       2 ABOVE 

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

     HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 360509     20,000
     HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 775245    100,000
     HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 357206    495,365
     HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 747381     42,000
     HSBC GLOBAL CUSTODY NOMINEE (UK) LTD A/C 866203     28,000



5)   Number of shares/amount of stock acquired.

     550,000

6)   ( 2.61 %) of issued Class

7)   Number of shares/amount of stock disposed

      --

8)   ( N/A %) of issued Class

9)   Class of security

      25P ORDINARY SHARES

10)  Date of transaction

      3 MARCH 2003

11)  Date company informed

      4 MARCH 2003

12)  Total holding following this notification

      685,365
               
13)  Total percentage holding of issued class following this notification

      3.25%

14)  Any additional information



15)  Name of contact and telephone number for queries

     MRS C E BRAY
     01793 567900

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

     Date of Notification ...4 MARCH 2003....



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