Sorry about the lack of updates, but I wanted to see if anything improved over time.
Sadly it hasn't. The throughput has remained at about 47Mbps, so I'm guessing the sync rate is about 50Mbps.
This seems to be the maximum rate I'm going to achieve on TT, which is still below the guaranteed 54.8Mbps I was promised. I've had several visits from Openreach engineers and tried various routers/modems.
Is there anything you can offer me in compensation?