BT have had trouble with this exchange (http://aastatus.net/2052) but we are now seeing evening congestion on TalkTalk connected lines. We have reported this and will update this post accordingly.
TalkTalk have fixed a misconfiguration at their end. This should now be resolved. We'll check again tomorrow.
Lines still seem to be congested, this is being looked in to by TalkTalk.
Update from TT 'This should now properly be resolved. A faulty interface meant that we were running at 2/3 of capacity - only a few of your subscribers would have suffered last night hopefully but should now all be good.'