Just sits with hourglass spinning, and eventually returns a "no data from server "etc error depending on what browser you are using. Does it on all 3 computers (windows 7, 8 and XP) and an Ipad, so not a computer problem. Tried enough modem/router, with no improvement. Tried using 18.104.22.168 as the DNS server, rather than the default Vodafone one. No improvement. You can always ping www.facebook.com OK. The work around to make it work is to go to the IP address that the ping returned (22.214.171.124), and after a warning from chrome that the site might be fake, always goes OK. A tracert always competes OK also.
Bit stuck on this one. Very intermittant, and you think you have fixed it and then it breaks again...