Holding(s) in Company

Diploma PLC
4 August 2003


LETTER TO:  DIPLOMA PLC
            1 August 2003


Disclosure of Interest in Shares 
Section 198 to 202 of the Companies Act 1985

In accordance with Section 198 to 202 of the Companies Act 1985, we write to
advise you that on 30 July 2003, Herald Investment Trust plc (HIT) sold 90,000
ordinary shares in your company.

HIT now has a holding of 900,000 ordinary shares in Diploma PLC.

This represents approximately 3.97% of the issued ordinary shares (based on
22,648,000 shares in issue).

The shares are held under BNY (OCS) Nominees Limited.

From:  Baillie Gifford & Co.
       Secretaries to Herald Investment Trust plc
 
       Lindsey M Beattie 
       Head of Investment Trust Accounting

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