Welcome to the forum. As far as I know it does, you have to be at a Sky-enabled exchange to get it and IP checks show as Sky Broadband. For a definitive answer you're probably best giving the Combo Team a call, who can also check your line and advise what speeds you could expect. You'll find the number on your My Account > My Package page
If it's like TalkTalk, the telephone is connected via the LLU, while the fibre broadband is BT Wholesale. (ADSL2+ uses LLU).
@Anonymous User After i got an unusually low speed estimate when i look at taking the combo i phoned now tv.I asked why the estimate i got was low and explained that i was currantly with sky and got between 15/17 mbs.
They told me that they use there own network so would not get the speed i get with sky.