I am experiencing the same symptoms as mrlipring and I am not looking forward to ringing TS for the 3rd time this week.
The call center in India promised me an appointment for an engineer would be arranged within 48 hours but that hasn't happened.
So my plan basically is that if I get no joy from TS then I ask for the Call Center Manager and give him some grief.
I did check my signal levels last night, the downstream power was fluctuating between +6 and -14, when it steadied for a few seconds the modem locked and then dropped it when the signal went wanging around again. The upstream was +65 and fairly stable. I'm guessing it isn't the modem?
Also on the scheduled maintenance, some work was scheduled for last night in Farnborough, does anybody know what sort of thing would have been done, and is it likely to improve my signal?
Cheers
ViLLaN