Holding(s) in Company

Porvair PLC
11 November 2004


               SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We were advised today of the following holding by Legal & General Group plc

Registered owner                        No.of shares          % holding

HSBC Global Custody Nominee(UK)Ltd       1,735,106               4.71%



              SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We were advised today of the following holding by M&G Group Ltd

Registered owner                  No. of shares           % holding
  
Nortrust Nominees Ltd               3,884258                 10.55





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