Notifiable Interest

27 Apr 2007 15:16

Tristel PLC27 April 2007 Tristel 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: Tristel PLC 2. Reason for the notification DTR disclosure requirements 3. Full name of person(s) subject to the notification obligation: Peter Stephens 4. Full name of shareholder(s) (if different from 3): 5. Date of the transaction (and date on which the threshold is crossed orreached if different): n/a 6. Date on which issuer notified: 18/04/07 7. Threshold(s) that is/are crossed or reached: > 3% 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 possibleusing ISIN CODE Number of Number of Number of Number of voting % of voting rights Shares Voting Rights shares rights Direct Direct Indirect Direct Indirect 766,954 766,954 3.14% 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 Total (A+B)Number of voting rights % of voting rights 766,954 3.14% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: N/A 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: n/a 14. Contact name: Contact Peter Stephens 15. Contact telephone number: 0207 4932662 This information is provided by RNS The company news service from the London Stock Exchange