That would explain a fix for a computer specific problem resolving DNS but it doesn't explain the message you posted that they would be wasting their time changing DNS when it was obviously not just a DNS issue on a specific computer. BT posted that there was a fault with their DNS and when posters changed their DNS to Google or OpenDNS it was resolved.
EDIT. The poster of message 4 in this thread flushed his DNS cache when the problem started and it made no difference.
I'm having this problem also with Infinity2 75mb, Obviously part of the goverment snoopers charter, rip free speech.
Getting the same problems here too. Started yesterday but seemed to sort itself out by the evening, but has flared up again this morning.
Google seems sluggish here again in Hereford this evening. Some web pages not displaying all content.
Primary DNS 18.104.22.168
Secondary DNS 22.214.171.124
Im also having some minor problems with one or two web pages this evening so the issue has not been fully resolved. I had minor problems yesterday also. I even had a minor problem with the BT TV service yesterday afternoon thats now seems to have been fixed.
Im also on Infinity 2.
having same problem here since yesterday,, all im getting is this webpage is not available.. im in south-yorkshire