Just want to add that there has been recent press saying that talk talk are stuggling to cope for some reason, cant remember what it was, with their broadband packages. I suggest you actually call them for advice.
But just in defence of them..their phone service is the best on the market though, excellent service, cheap bills and no fuss, and free calls to anyone else with talk talk.
No I am not a salesmen but honestly their phone service is good but yeah, I hear there are problems with their internet stuff.
To be honest thats why I resisted going with them when they started it. Because all new ventures go through problems early on..so I thought I would wait to see how everyone else felt about it..clearly I was right to wait.
Good luck