Ah, is calling the Quickstart number the replacement for going to
start.ntl 
?
I'll keep an eye on the SNR, but what I'm struggling to understand is why both the Indian and UK TS saw a different figure to what I see on the modem, given that we are ostensibly looking at the same thing. In both calls, my downstream SNR was in the range 21.5 - 22.5 Db, but TS reported it around 26 - 27 Db. Be good to know if you could shed some light on why that might be.
Cheers again.
Matt