Holding in Company

Porvair PLC
1 February 2001

LETTER TO:  COMPANY ANNOUNCEMENTS OFFICE

            SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We were advised today of the following declarable holdings by Schroder
Investment Management Limited:

Registered owner                    No. of shares           % holding

Imperial Pensions Nominees Limited      200,000
Chase Nominees Limited                3,191,950            

                                      3,391,950               13.183

From:  Mark Moran (Company Secretary)