When it works everything looks fine no speed problems at all
I did the tracert tests here its the log :
Tracing route to www.bbc.net.uk [212.58.224.86]
over a maximum of 30 hops:
1 12 ms 37 ms 36 ms 10.251.127.254
2 12 ms 24 ms 17 ms lutn-t2cam1-b-ge92.inet.ntl.com [80.4.118.129]
3 10 ms 7 ms 7 ms lutn-t2core-b-ge-wan62.inet.ntl.com [213.107.47
205]
4 10 ms 8 ms 10 ms nth-bb-b-so-220-0.inet.ntl.com [62.253.188.189]
5 25 ms 24 ms 20 ms pop-bb-a-so-100-0.inet.ntl.com [213.105.172.14]
6 25 ms 15 ms 18 ms tele-ic-2-so-000-0.inet.ntl.com [62.253.185.86]
7 73 ms 21 ms 39 ms 212.58.239.217
8 40 ms 27 ms 26 ms 212.58.238.153
9 * 22 ms 28 ms www41.thdo.bbc.co.uk [212.58.224.86]
Trace complete
Now about the box... my modem is the only thing connected so it should be STB ?