Blocklisting Interim Review

Porvair PLC
19 March 2008


Porvair PLC

Block Listing Return

Date: 19 March 2008

Name of applicant:                        Porvair PLC

Name of scheme:                           2003 Save As You Earn Scheme

Period of return:                         From: 15/06/07        To: 18/03/08

Balance of unallotted securities under    220,000 ordinary shares of 2p each
scheme(s) from previous return:

Plus: The amount by which the block       Nil
scheme(s) has been increased since the
date of the last return (if any increase
has been applied for):

Less: Number of securities issued/        123,920 ordinary shares of 2p each
allotted under scheme(s) during period:

Equals: Balance under scheme(s) not yet   96,080 ordinary shares of 2p each*
issued/allotted at end of period:

*All options which have not already been issued and allotted under the Porvair
PLC 2003 Save As You Earn Scheme have now expired. Accordingly, no further
shares will be issued or allotted pursuant to this Scheme.

Name of contact:                          Chris Tyler, Company Secretary
Telephone number of contact:              01553 765 500




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