Holding(s) in Company

Porvair PLC
3 June 2003



                 SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We were advised today that Schroder Investment Management Ltd have acquired
500,000 shares on behalf of institutional clients on a non-beneficial basis.

Schroder Investment Management Ltd now have total interests in Porvair plc of
7,811,623 shares, representing 21.23% of the Company's issued share capital.


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