We've had some lines dropping and reconnecting this evening, between 20:50 and 21:20. Things seem back to normal now, but we're investigating the cause.
During the times above customers would have experienced routing problems, perhaps packetloss and VoIP problems. (although my Netflix stream was unaffected :-) )
Sorry about that everyone, early indicators is that a few DLS lines were being DOSd, and although our automated systems did drop the PPP and blackhole their IPs across the most of the internet, it did cause problems for some customers. We'll continue to monitor the network this evening and will do some more investigations in the morning as to the cause and how to help prevent this sort of thing in the future.