Holding(s) in Company

Dialight PLC 14 September 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: DIALIGHT PLC 2. Reason for the notification (please state 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: (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: HERMES UK SMALL COMPANIES FOCUS FUND 4. Full name of shareholder(s) (if different from 3.): N/A 5. Date of the transaction and date on which the threshold is crossed or reached if different): 12 SEPTEMBER 2007 6. Date on which issuer notified: 13 SEPTEMBER 2007 7. Threshold(s) that is/are crossed or reached: 25% 8. Notified details: A: Voting rights attached to shares Class/type of shares Situation previous to if possible using the the Triggering ISIN CODE transaction Number of shares Number of voting Rights ORDINARY SHARES 7,629,389 7,629,389 Resulting situation after the triggering transaction Class/type of shares Number of shares Number of voting rights % of voting rights if possible using the ISIN CODE Direct Direct Indirect Direct Indirect ORDINARY SHARES 7,971,304 7,971,304 N/A 25.517% N/A B: Financial Instruments Resulting situation after the triggering transaction Type of Expiration Date Exercise/Conversion Number of voting % of voting financial Period/ Date rights that may be rights instrument acquired if the instrument is exercised/ converted. NIL Total (A+B) Number of voting rights % of voting rights 7,971,304 25.517% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: N/A 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: THIS DISCLOSURE IS MADE BY HERMES INVESTMENT MANAGEMENT LIMITED AS AGENT ON BEHALF OF THE HERMES UK SMALL COMPANIES FOCUS FUND 14. Contact name: CATHRYN BUCKLEY 15. Contact telephone number: 01480 447490 This information is provided by RNS The company news service from the London Stock Exchange

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Dialight (DIA)
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