Holding(s) in Company

Porvair PLC
21 May 2003


SECTION 198 COMPANIES ACT 1985 - 3% NOTIFIABLE INTEREST


We were advised today of the following declarable holdings managed on a
discretionary basis by Schroder Investment Management Ltd:

Registered owner                         No. of shares          % holding

Imperial Pensions Nominee Ltd               900,000               
British Coal Staff Superannuation a/c       171,121
Mineworkers Pension Scheme a/c               13,879
Schroder Unit Trusts Ltd                  6,026,623
                                                                  19.323






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