That depends on where you live and how much you are prepared to pay.
Afaict in most urban areas BT openreach "broadband" services top out at "up to 80Mbps" FTCC. In a few trial areas they have "up to 120Mbps" FTTC or "up to 330Mbps" FTTP.
There was supposed to be a product called FTTPoD which would allow people in FTTC areas to get FTTP if they paid a steep (usually thousands of pounds iirc) installation charge but new installations under that program have been suspended.
Virgin media are offering a 200Mbps cable package for home broadband customers and a 300Mbps cable package for buisness broadband customers.
If you move beyond the "broadband" products to the dedicated fiber products then it becomes a matter of how much you are prepared to pay.