Holding(s) in Company

Porvair PLC
16 August 2002


LETTER TO RNS 


     SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST
     -------------------------------------------------------

We were advised today of the following sale by Newton Investment Management
Limited:

     Registered owner          No. of shares          % holding
     ----------------          -------------          --------
     
     Newton Exempt Fund        1,818,482               0


FROM PORVAIR PLC

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