1 Exhibit 24 POWER OF ATTORNEY NYNEX CableComms Group PLC NYNEX CableComms Group Inc. The undersigned, acting in the capacity or capacities stated opposite their respective names below, hereby severally constitute and appoint John F. Killian, Paul H. Repp and Graham L. Robertson, and each of them, with full power to act alone, our true and lawful attorneys and agents to do any and all acts and things and to execute any and all instruments which they deem necessary or advisable to enable NYNEX CableComms Group PLC, a public limited company incorporated under the laws of England and Wales, and NYNEX CableComms Group Inc., a Delaware company (collectively, the "Companies"), to comply with the Securities Exchange Act of 1934, as amended, and any rules, regulations and requirements of the Securities and Exchange Commission in respect thereof, in connection with the filing under Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, of the Companies' Annual Report on Form 10-K for the year ended December 31, 1996, and any amendments thereto, including specifically, but without limiting the generality of the foregoing, the power and authority to sign the name of each of the Companies and the names of the undersigned directors and officers in the capacities indicated below to such annual Report and any amendment thereto. Signature Title with Each of the Companies Date - - --------- -------------------------------- ---- /s/ Richard W. Blackburn - - ------------------------- March 13, 1997 Richard W. Blackburn Chairman and Director /s/ John L. Rennocks - - ------------------------- March 14, 1997 John L. Rennocks Deputy Chairman and Director /s/ John F. Killian - - ------------------------- March 13, 1997 John F. Killian President and Chief Executive Officer (Principal Executive Officer) and Director /s/ Graham L. Robertson - - ------------------------- Graham L. Robertson Acting Chief Financial Officer March 13, 1997 (Principal Financial and Accounting Officer) /s/ Robert T. Anderson - - ------------------------- March 14, 1997 Robert T. Anderson Director /s/ Jeffrey A. Bowden - - ------------------------- March 14, 1997 Jeffrey A. Bowden Director /s/ Sir Bryan Carsberg - - ------------------------- March 19, 1997 Sir Bryan Carsberg Director /s/ Sir Michael Checkland - - ------------------------- March 13, 1997 Sir Michael Checkland Director /s/ Nicholas P. Mearing-Smith - - ----------------------------- March 13, 1997 Nicholas P. Mearing-Smith Director /s/ Mel Meskin - - ------------------------- March 14, 1997 Mel Meskin Director