All communications hereunder will be in writing and effective only on receipt, and, if sent to the Representatives, will be mailed, delivered or telefaxed to (i) Citigroup Global Markets Inc., 388 Greenwich Street, New York, New York 10013 Attention: General Counsel, facsimile number 1-646-291-1469.; and (ii) HSBC Securities (USA) Inc., 452 Fifth Avenue, New York, New York, 10018, Attention: Transaction Management Group (Facsimile Number 1-212-525-0238); or, if sent to the Company, will be mailed, delivered or telefaxed to Jonathan H. Baksht, Chief Financial Officer, 6 Chesterfield Gardens, London W1J5BQ, England, United Kingdom (fax no.: 44 0 207 409 0399) and confirmed to Michael T. McGuinty, Senior Vice President, General Counsel and Secretary, 6 Chesterfield Gardens, London W1J5BQ, England, United Kingdom (fax no.: 44 0 207 409 0399) with a copy to Baker Botts L.L.P., 910 Louisiana Street, Houston, TX 77002, Attention:  Tull Florey (fax no.: (713) 229-2779).