Holding(s) in Company

Porvair PLC
15 November 2006

To:    RNS
Dated: 14 November 2006


SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We have been advised of the following holding by M&G Investment Management
Limited held in portfolios managed by them on a discretionary basis.

Registered owner                   No. of shares         % holding

Nortrust Nominee Ltd A/C MKK01         5,320,632             13.11

Total held                             5,320,632             13.11

CHRIS TYLER
COMPANY SECRETARY
PORVAIR PLC


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