Holding in Company

19 Mar 2007 18:18

Porvair PLC19 March 2007 Holding in Company 1. Identity of the issuer or the underlying issuer of existing shares to whichvoting rights are attached: Porvair plc 2. Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights: ( X ) An acquisition or disposal of financial instruments which may result in theacquisition of shares already issued to which voting rights are attached: ( ) An event changing the breakdown of voting rights: ( ) Other (please specify): ( ) 3. Full name of person(s) subject to the notification obligation: Schroders plc 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): 14/03/2007 6. Date on which issuer notified: 15/03/2007 7. Threshold(s) that is/are crossed or reached: From 22% - 21% 8. Notified details: A: Voting rights attached to shares Class/type of shares Situation previous to the triggering transaction Ordinary Number of Shares Number of Voting RightsGB0006963689 9,327,710 9,327,710 Resulting situation after the triggering transaction Number of shares Number of voting rights % of voting rightsDirect Direct Indirect Direct Indirectn/a n/a 8,896,427 n/a 21.928% B: Financial Instruments Resulting situation after the triggering transaction Type of Expiration Exercise / Number of voting rights that may % offinancial date conversion be acquired if the instrument is votinginstrument period / date exercised / converted rights Total (A+B): Number of voting rights % of voting rights 8,896,427 21.928% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: Schroder Investment Management Limited 8,876,427 21.88%Schroder & Co Limited 20,000 0.049% Proxy Voting: 10. Name of the proxy holder: 11. Number of voting rights proxy holder will cease to hold: 12. Date on which proxy holder will cease to hold voting rights: 13. Additional information: The shares referred to in section 9 are held in portfolios managed by thosefirms on a discretionary basis for clients under investment managementagreements. 14. Contact name: Chris TylerGroup Finance Director and Company SecretaryPorvair plc 15. Contact telephone number: 01553 765 500 This information is provided by RNS The company news service from the London Stock Exchange