Holding(s) in Company

Porvair PLC
13 November 2006



To: RNS


SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We have been advised of the following holding by Cavendish Asset Management
plc held in portfolios managed by them on a discretionary basis.

Registered owner                 No. of shares        % holding
----------------                 -------------        ---------

Cavendish Asset Management           1,422,285             3.51

Cavendish Opportunities Fund           350,000             0.86

Total held                           1,772,285             4.37


From:  Chris Tyler
       Company Secretary
       Porvair plc   


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