Holding(s) in Company

Porvair PLC
6 May 2005


Letter to RNS


            SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST


We were advised today that F&C Asset Management plc have an interest in 
2,136,950 shares which are held as portfolios managed by them on a discretionary 
basis for clients under investment management agreements.

This interest represents 10.08% of the Company's issued share capital.


Letter from Porvair Plc


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