Holding(s) in Company

Porvair PLC
26 November 2002


LETTER TO: RNS


           SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We were advised today of the following declarable holdings by ISIS Asset 
Management plc:


Registered owner                      No. of shares       % holding

• FPCP Stewardship
  (HSBC GS Nominees Ltd)                  1,563,202            4.25
• FP Inv Co Stewardship Growth Fund
  (Citifriends Nominees Ltd)              1,322,857            3.59


Including the above material interests ISIS Asset Management plc is interested 
in a total of 4,233,147 shares (11.50%).


LETTER FROM: PORVAIR PLC



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