Holding(s) in Company

Porvair PLC
11 September 2002


LETTER TO RNS


            SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We were advised today that Schroder Investment Management Limited has a total
declarable interest of 5,687,429 shares which represents 15.45% of the issued
share capital.



FROM: PORVAIR PLC


                      This information is provided by RNS
            The company news service from the London Stock Exchange