Sky Broadband supplies over six million subscription addresses, so at any particular point in time there are going to be problems at some of them: 99.9% fault-free would be 6,000 problems.
* * * * * * *
Sky Glass 55" (on ethernet) & two Stream Pucks (one ethernet / one WiFi) BT Halo 3+ Ultrafast FTTP (500Mbs), BT Smart Hub 2
