PROSPECTUS SUPPLEMENT NO. 9                                    Filed pursuant to
(To Prospectus dated September 20, 1996)                          Rule 424(b)(3)
                                                      Registration No. 333-07879

$275,000,000

NTL Incorporated
7% Convertible Subordinated Notes Due 2008

     This  Prospectus  Supplement  No. 9 supplements  and amends the  Prospectus
dated  September  20,  1996,  as  amended  and  supplemented  by the  Prospectus
Supplements dated April 15, 1997, May 23, 1997,  October 24, 1997,  November 18,
1997,  February  18, 1998,  March 18, 1998,  April 2, 1998 and May 13, 1998 (the
"Prospectus"),  relating to the 7% Convertible  Subordinated Notes Due 2008 (the
"Convertible  Notes")  of NTL  Incorporated  (formerly  known  as  International
CableTel  Incorporated)  (the "Company") and the shares of the Company's  common
stock,  par value $.01 per share ("Common  Stock"),  issuable upon conversion of
the Convertible Notes.

     The table on pages 68 and 69 of the Prospectus sets forth  information with
respect to the Selling Holders (as defined in the Prospectus) and the respective
amounts of Convertible Notes  beneficially owned by each Selling Holder that may
be offered  pursuant to the  Prospectus  (as  supplemented  and  amended).  This
Prospectus  Supplement  amends that table by  replacing  items 78 and 79 of that
table with the corresponding items set forth below.

     Selling Holder                                          Principal Amount
                                                           of Convertible Notes

"78. Lindner Dividend Fund..................................   $  3,965,000
 79. Any other holder of Convertible Notes or future
     transferee from such holder............................   $ 16,289,500
     Total..................................................   $275,000,000"

     The Prospectus, together with this Prospectus Supplement No. 9, constitutes
the prospectus required to be delivered by Section 5(b) of the Securities Act of
1933, as amended,  with respect to offers and sales of the Convertible Notes and
the Common Stock issuable upon conversion of the Convertible Notes.

     Prospective investors should carefully consider matters discussed under the
caption "Risk Factors" beginning on page 10 of the Prospectus.

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE  COMMISSION OR ANY STATE  SECURITIES  COMMISSION NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

        The date of this Prospectus Supplement No. 9 is August 20, 1998.