i also had same problem but its ok now and blueyonder confirmed to me that it is a certain ip range causeing the problem alot of people are haveing problems connecting to a whole lot of sites just go read blueyonder.support newsgroup

i think it was the ip range starting with 82.
from blueyonder technical support "We do have an umbrella open regarding customers with 82 ip`s not being able
to resolve certain web sites so I need examples of pages you cannot resolve
and trace routes to these plus winipcfg/ipconfig /all details"
this is how you can open all websites "I have changed my webcache to webcache.bt.net on port 3128 and now I can
visit all the sites I had problems with."
this is how to change webcahe below
I've copied and pasted the info from the
www.by-users.co.uk site for you,
hope it helps
Internet Explorer - Broadband
Open My Computer.
Open Control Panel.
Open Internet Options.
Choose the Connections tab.
Click the LAN Settings button.
Click the Settings button.
Put a tick in Use a Proxy Server.
Make sure there is nothing filled in in the Address and/or port boxes. If
these are grey and you can't edit them don't worry, simply go to step 9.
click the Advanced button.
If any boxes are filled in, make them blank (click on each box and use the
Del and Backspace keys).
At the top of this window should be a line which says HTTP and then
Address and Port.
On this line only, use the following settings:
Address: webcache.blueyonder.co.uk
Port: 8080 or 3128