PROSPECTUS SUPPLEMENT NO. 11                                   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. 11  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, May 13, 1998 and August
20, 1998,  August 24, 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 item 79 of that table with
the  corresponding  item set forth below and (ii) adding item 80 set forth below
to that table.

     Selling Holder                                          Principal Amount
                                                           of Convertible Notes

"79. Associated Electric & Gas Insurance Service............   $    425,000
 80. Any other holder of Convertible Notes or future
     transferee from such holder............................   $          -
     Total..................................................   $275,000,000"

     The  Prospectus,   together  with  this   Prospectus   Supplement  No.  11,
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. 11 is February 10, 1999.