Re Irrevocable Undertakings

Aminex PLC
23 April 2002


                                   AMINEX PLC

                          ("Aminex" or "the Company")


Over 17 per cent. of Aminex Shareholders Cannot or Will Not Accept Apple's Offer

The Board of Aminex is pleased to announce that it has received additional
irrevocable undertakings not to accept the offer made by Apple Oil and Gas
Limited ("Apple") in respect of a further 1,463,691 shares of Aminex,
representing approximately 1.62 per cent. of Aminex's total issued share
capital. These undertakings will cease to be binding after 30 September 2002.

This follows Aminex's announcement of last week, when it stated that holders of
a total of 14,287,823 shares of Aminex, representing 15.84 per cent. of Aminex's
total issued share capital, had either irrevocably undertaken not to accept
Apple's Offer or were prevented from selling or otherwise disposing of the
relevant Aminex shares prior to 1 September 2002.

Therefore, as of today's date, holders of a total of 15,751,514 shares in
Aminex, representing approximately 17.46 per cent. of Aminex's total issued
share capital, have either undertaken not to accept Apple's Offer or are
prevented from selling or otherwise disposing of the relevant Aminex shares
prior to 1 September 2002.

                                                                   23 April 2002

Enquiries:

Aminex PLC                                            [phone]
Brian Hall

Davy Corporate Finance Limited                        [phone]
Hugh McCutcheon

College Hill                                          [phone]
James Henderson
Archie Berens

Dennehy Associates                                    [phone]

Michael Dennehy



Responsibility Statement

The directors of Aminex accept responsibility for the information contained in
this announcement except that the only responsibility accepted in respect of the
information relating to Apple, which has been complied from published sources,
is to ensure that it has been correctly and fairly reproduced and presented.
Subject as aforesaid, to the best of the knowledge and belief of the directors
of Aminex (who have taken all reasonable care to ensure that such is the case),
the information contained in this announcement for which they accept
responsibility is in accordance with the facts and does not omit anything likely
to affect the import of such information.



Davy Corporate Finance Limited, which is authorised to carry on investment
business in Ireland by the Central Bank of Ireland, is acting exclusively for
Aminex and no one else in connection with the offer and will not regard any
other person as its client or be responsible to any person other than Aminex for
providing the protections afforded to clients of Davy Corporate Finance Limited,
nor for giving advice to any such person in relation to the offer.



Davy Corporate Finance Limited has approved the contents of this announcement
solely for the purpose of section 21 of the Financial Services and Markets Act
2000. The principal place of business of Davy Corporate Finance Limited is Davy
House, 49 Dawson Street, Dublin 2, Ireland.



23 April 2002





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