Last Day of Trading in ARCO Common Stock

BP Amoco PLC
17 April 2000

BP Amoco and ARCO confirmed today that contrary to a notice which appeared in
some editions of the Financial Times this morning, they plan to close their
combination transaction on Tuesday, April 18 at 08.00 London time.  As
announced on April 13, the last day of trading in ARCO Common Stock therefore
will be today, April 17.