Hi Craig
Possibly about the time I noticed. Speeds have dropped and I can never get full speed anymore, I'm beginning to think that TalkTalk have permanently taken away some bandwidth from those of us on 80/20 in order to help average speeds elsewhere on their network.
AAISP moved their customers over to a new network at TalkTalk, I'm not sure if I moved across or not given I'm with Uno, but it was about the same time speeds started showing a decline, no matter if off peak or peak times. Current speed test at Thinkbroadband shows single threaded at 48.5Mbps, multi-threaded at 69.3Mbps, so that indicates congestion, but it's not really low enough to complain about.
Regards
Phil