I think it's the DNS servers playing up. Try pinging the web address for the 'real' address
Start > Run > cmd to open a DOS box, type ping
www.bbc.co.uk and you'll get something like:
Pinging
www.bbc.net.uk [212.58.227.77] with 32 bytes of data:
Reply from 212.58.227.77: bytes=32 time=17ms TTL=244
Reply from 212.58.227.77: bytes=32 time=17ms TTL=244
Reply from 212.58.227.77: bytes=32 time=17ms TTL=244
Reply from 212.58.227.77: bytes=32 time=15ms TTL=244
Ping statistics for 212.58.227.77:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 15ms, Maximum = 17ms, Average = 16ms
As you see there's no packet loss, drop 212.58.227.77 into you're browser and see if it loads.
DW