Slow speed / Noise Margin

[#1]

Hi
Broad band has been fine since it was installed about a month back, until 2 days ago.
Speed is at a crawling pace and the noise margin has shot up from 6db to 24db (I'm guessing these are linked).
Tried router reset, test socket etc....no improvement. Same old problems as every other ISP, starts off well then just seems to get worse and worse 
All internal wiring/filters are fine, brand new router.
Any suggestions would be appreciated
Thanks
Adam

[#2]

Information requested here would help but the odds are that your line has been banded due to instability http://community.plus.net/forum/index.php/topic,96155.0.html

[#3]

Looks like the line went problematic last night
<img src="http://community.plus.net/visualradius/generated/image13874804148508.png"/>
I can see you've reported a fault regarding a noisy telephone line? If this is the case we'll have to get that sorted before looking into the slow speeds
Let me know if there's anything else I can do to help

[#4]

Thanks for the reply. This has all happened in the last 2 days (including noisy line).
Constant disconnects as well as the slow speed which I forgot to add in my OP.
Don't suppose bad weather could have anything to do with it?