It is crap but it's not you but with BT. I had same problem for over three weeks only just getting back to normal now, what I heard was that BT were up-grading the network but cause the whole system to crash everywhere affecting schools, local gov's, trade and anyone else with internet access. Then it affected the landline it was like listening to a bowl off rice crispies.
Right now I'm running at D/load 3.76meg, but have foned BT to have the BRAS profile reset should go upto 6.7meg on Tues.
