Sync speed is 68/20
Wait for DLM to see if it will readjust. Take a look at the https://www.dslchecker.bt.com/adsl/ADSLChecker.Addre...
checker! What does it say for your line, max speeds?
This should give you an indicator if your line is capable of faster speeds.
Now I don't know if it is the rain or the storm that has to do with the reduced noise margins. In my case there is a drop in my noise margin.
Actual Rate [Kbps] 80000 19999
Maximum Rate [Kbps] 80534 19999
Noise Margin [dB] 5.90 15.10
Attenuation [dB] 17.90 0.00
Power [dBm] 13.00 7.60
Drop from 6.40dB to 5.90dB and my Upload has dropped from 15.40dB to 15.10dB! Now I blame this on the rain and storm, but my connection sync has remained so far stable 14 days at full 80000Kbps sync, so I am pleased for now as long as it doesn't drop any further.
I am around 300 meters from cabinet. It was like 68/20 when I first joined TalkTalk on the 3rd of Feb and then it jumped to 80/20 after a few days and initially I was getting only 66-69 Mbps in speed test despite 80000 but then after 3-4 days it suddenly started giving me speed tests of 75-80 Mbps.
Things can improve, make sure Faceplate MK4 is installed and there aren't any other internal wiring issues. Use Cat 5/6/7 cables instead of WiFi.