Exhibit 99.1

Certification of CEO and CFO Pursuant to
18 U.S.C. Section 1350,
as Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

     In connection with the Quarterly Report on Form 10-Q of NTL Incorporated (the “Company”) for the quarter ended March 31, 2003 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Barclay Knapp, as Chief Executive Officer of the Company, and Scott E. Schubert, as Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of his knowledge, that:

     (1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

     (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Barclay Knapp

Name:      Barclay Knapp

Title:      Chief Executive Officer

Date:      May 14, 2003

/s/ Scott E. Schubert

Name:      Scott E. Schubert

Title:      Chief Financial Officer

Date:      May 14, 2003

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934.

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