Holding(s) in Company

Dialight PLC 18 October 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: BT PENSION SCHEME TRUSTEES LIMITED AS TRUSTEE OF THE BT PENSION SCHEME. SEE SECTION 9 FOR FURTHER INFORMATION 4. Full name of shareholder(s) (if different from 3.): HERMES UK SMALL COMPANIES FOCUS FUND 5. Date of the transaction and date on which the threshold is crossed or reached if different): 16 OCTOBER 2007 6. Date on which issuer notified: 17 OCTOBER 2007 7. Threshold(s) that is/are crossed or reached: 26% 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 7,971,304 7,971,304 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 0 0 8,271,304 0% 26.477% 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 8,271,304 26.477% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: BT Pension Scheme Trustees Limited is the parent undertaking of Britel Fund Trustees Limited, which is the parent undertaking of Hermes Pensions Management Limited. Hermes Pension Management Limited is the parent undertaking of: 1. Hermes Investment Management Limited (voting rights held in the issuer: 0%) 2. Hermes Focus Asset Management Limited (voting rights held in this issuer: 26.477%) Please see Section 13 for further information. Proxy Voting: 10. Name of the proxy holder: SEE COMMENT IN SECTION 13 11. Number of voting rights proxy holder will cease to hold: SEE COMMENT IN SECTION 13 12. Date on which proxy holder will cease to hold voting rights: SEE COMMENT IN SECTION 13 13. Additional information: Hermes Investment Management Limited hold the voting rights under a standing proxy contained in investment management agreements with various underlying clients, which includes all the shares owned directly by BT Pension Scheme. Hermes Focus Asset Management Limited hold the voting rights as General Partner under a standing proxy contained in limited partnership agreements with various limited partnerships. All voting rights held on behalf of the above entities are aggregated for the purposes of DTR 5.2.1 (a) and disclosed pursuant to DTR 5.1.5. This disclosure is made by BT Pension Scheme Trustees Limited, which is the ultimate parent undertaking for the purposes of DTR 5.2.1 (e) 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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