Purchase of Own Securities

Porvair PLC 24 March 2000 Porvair plc ('the Company') Purchase of Ordinary Shares On 24 March 2000 the Company acquired 10,000 ordinary shares of 2p each in the Company ('Ordinary Shares') representing 0.04 per cent. of the Company's issued ordinary share capital at a price of 205p per Ordinary Share. Following this acquisition the Ordinary Shares are to be cancelled and the Company's issued ordinary share capital will be reduced to 25,673,073 Ordinary Shares.