Holding(s) in Company

Porvair PLC
28 April 2004


SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST

We were advised today that Schroder Investment Management Ltd have an interest 
in 8,090,519 shares which are held as portfolios managed by them on a 
discretionary basis for clients under investment management agreements.

This interest represents 21.983% of the Company's issued share capital.
 
 



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