IDH.L Regulatory News (IDH)

8 May 2007 07:01

Immunodiagnostic Systems Hldgs PLC08 May 2007 Immunodiagnostic Systems Holdings PLC ("the Company") Notifiable Interest A form TR-1 containing the following information has been received by theCompany. TR-1 notification of major interests in shares 1. Identity of the issuer or the underlying issuer of existing shares to whichvoting rights are attached: Immunodiagnostic Systems Holdings PLC 2. Reason for the notification An acquisition or disposal of voting rights 3. Full name of person(s) subject to the notification obligation: Brewin Dolphin Securities Limited 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 orreached if different): 3rd May 2007 6. Date on which issuer notified: 4th May 2007 7. Threshold(s) that is/are crossed or reached: 5% 8. Notified details: A: Voting rights attached to sharesClass/type of Situation previous to Resulting situation after the triggering transactionshares Triggering transaction Notification required under DTR transitional provision 7if possible usingISIN CODE Number of Number of Number of Number of voting rights % of voting rights Shares Voting shares Rights Direct Direct Indirect Direct Indirect Ordinary shares Below 5% Below 5% N/A N/A 709,034 5.3132% GBP0.02 GB00B01YZ052 B: Financial InstrumentsResulting situation after the triggering transaction Type of financial Expiration date Exercise/ Number of voting % of voting rightsinstrument Conversion Period/ rights that may be Date acquired if the instrument is exercised/ converted N/A N/A N/A N/A N/A Total (A+B)Number of voting rights % of voting rights 709,034 5.3132% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: Indirect - Brewin Nominees (Channel Islands) Limited - 9,000 0.0674% Indirect - Giltspur Nominees Limited - 700,034 5.2458% 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: Figures based on shares in Issue of 13,344,667 The indirect voting rights under (9) relate to shares held in client portfolios,managed by those firms, under discretionary investment management agreements. 14. Contact name: Yiu Ming Ly ASI 15. Contact telephone number: 0191 279 7597 This information is provided by RNS The company news service from the London Stock Exchange