Holding(s) in Company

Porvair PLC
8 February 2005


Letter to RNS

SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We were advised today that Universities Superannuation Scheme Limited have an
interest in 1,350,000 shares which are held as portfolios managed by them on a
discretionary basis for clients under investment management agreements.

This interest represents 3.67% of the company issued share capital.

From: Porvair plc

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