Yep just as 'a bit' of the traceroute got through to the end, 2 bits didn't
Seems someone at BY has noticed this and traffic has been rerouted around the issue, or if core network congestion it's not present at 5:30am.
7 host-194-117-147-69.telewest.net (194.117.147.69) 2.954 ms 3.343 ms 199.252 ms
8 194.117.136.165 (194.117.136.165) 10.748 ms 10.816 ms 11.167 ms
9 194.117.136.170 (194.117.136.170) 10.922 ms 10.915 ms 10.688 ms
10 gat-bra-pos.telewest.net (194.117.136.90) 13.163 ms 12.959 ms 13.027 ms
11 172.18.18.42 (172.18.18.42) 13.324 ms * *
Nasty loss on the last hop there but could just be a symptom of the router being used
