EXHIBIT 99.1 TELEWEST COMMUNICATIONS PLC (THE "COMPANY") BOARD CHANGE 15-08-2003 Telewest Communications plc announces that Mark Luiz, group finance director, will be leaving the Company and resigning as a director of the Company with effect from 31 October 2003. Neil Smith, currently deputy group finance director will become group finance director. This will not be a board appointment. Cob Stenham, Chairman said: "We thank Mark Luiz for all he has done since joining Flextech in 1988 and for his contribution to the Company since the merger with Flextech in 2000". Enquiries: Jane Hardman Director of corporate communications 0207 299 5888 Mary O'Reilly Media relations manager 0207 299 5888