SNRM going up; speed going down

[#1]

Noise going up an speed going down steadily over the past several weeks.  Previously had the same problem a few months back, until SNRM reset by PN.
What causes this?  Nothing has changed.  Should be able to easily get 8M; and used to.

[#2]

HI fp,
done a few tests here and getting good results, so you could really do with going through the troubleshooting guide
http://www.plus.net/support/broadband/bbfaults/slowspeed.shtml
and if you're still suffering then raise a fault.
Jojo