I've just recently had BT Infinity installed. At first I was delighted with it (nearly 37 Mbps download), but over the past few weeks noticed a worrying pattern emerging. It seems that every evening and at weekends the speed drops significantly. For instance most of today and yesterday it's hovered around 3-4, apart from early this morning. When I check in the morning (7 am) the speed is always back at 34-37. I've tried replacing the HH3 with my own Netgear router and ran tests wire/wireless with the same result. Uploads are always rock solid at about 7-8.
Doing a bit of research I've come across various people mentioning congestion issues. I've no idea what technology is used here or where the congestion might occur (is it an issue at the local exchange) or more importantly what to do about it. I had a BT engineer around recently and he just checked the line and said everything was fine (which it was because he checked it at 2.00 on a Friday).
Any advice would be welcome.