I can't access BBC, eBay or Facebook.
I know the BBC is a known issue but the others? (I tried to get to all these sites on my mobile (three) and they work fine.
Can't seem to go a week without having broadband trouble.
What happens when you try to access them. Do you get any error codes, what screen comes up. Is it only these sites. Have you checked via MyBT to see if you have parental controls activated?