Change in Circumstances

Walker Greenbank PLC
13 October 2000


Walker Greenback plc ('the Company') was informed by Merrill Lynch & Co., Inc.
on 12 October 2000, pursuant to section 203 of the Companies Act 1985 ('the
Act'), of a change in circumstances given to the Company by Merrill Lynch
Investment Management Ltd ('MLIM') affecting their interest as disclosed
pursuant to the Act, that the companies, the names and addresses of which are
detailed in part one of the first schedule to this announcement (being certain
holding companies of MLIM), have interests in the relevant share capital of the
Company disclosed in the second schedule to this announcement; and the
companies, the names and addresses of which are set out in part two of the first
schedule to this announcement (which are holding companies of MLIM and certain
other companies), have interests in the relevant share capital of the Company
disclosed in the second schedule to this announcement.

FIRST SCHEDULE

PART ONE

Name                                          Address
Merrill Lynch Investment Management Ltd.      33 King William Street, 
                                              London EC4R 9AS

ML Invest Holdings Limited                    25 Ropemaker Street, 
                                              London EC2Y 9LY

ML Invest, Inc                                World Financial Center, 
                                              North Tower, 
                                              250 Vesey Street, 
                                              New York, NY 10281-1332


PART TWO

Name                                          Address
Merrill Lynch Group Inc.                      World Financial Center, 
                                              North Tower, 
                                              250 Vesey Street, 
                                              New York, NY 10281-1332

Merrill Lynch & Co., Inc.                     World Financial Center, 
                                              North Tower, 
                                              250 Vesey Street, 
                                              New York, NY 10281-1332


SECOND SCHEDULE

As at 5 October 2000 each company named below was interested in the following
shares of the Company:

Merrill Lynch & Co., Inc.      7,078,492 shares
Merrill Lynch Group Inc.       7,078,492 shares