This morning (Thursday, 11 August) I was unable to open this site (Alfred...) via three of the four browsers I could use.
That is, normal browser Opera, others: Firefox, and I think I tried Pesala's favorite Vivaldi. I didn't try Maxthon.
All other sites I tried were OK, just this one was unobtainable. This was on my Talktalk line. The router was working OK, as it's little white light was ON and as other sites were coming up well. Accessing the router base showed that I was getting my normal bit rate.
Now - the weird bit - When I switched to my BT line, I had no trouble at all with this site.
The situation recovered eventually. This may be coincidental with turning off and on my Talktalk router, and restarting the PC.
I did look for router settings with respect to site blocking, but as I said, the other browsers gave the same unobtainability result, so it was common to them all, and the line. Some weird thing at Talktalk? I should add that MS had ferformed some updates "overnight"
PS I have two landlines for historic reasons, one BT and one TT.