Yes It is a problem between NTL and Telia (who are blizzard europe's primary ISP) and a couple of other ISPs who NTL peer with through Telia.
So no way round the problem for now - personally I think that someone in telehouse has just unplugged the power cable for a rack (NTL and Telia both have lots of their equipment in telehouse), or one of the server rooms has overheated again and everything has shut down...but then i'm cynical
(plus if you have seen inside telehouse you will know what I mean..the aircon in there is a joke
lol)
I'm sure it will get fixed soon though...NTL are one of the UKs largest ISPs (like it or not) so they can't afford to have a major problem like this for long..