Connection Dropping - session graph?

[#1]

My connection has been dropping overnight recently (first noticed last Thursday night, I think) and my speed, which was 6.5 Mbps until recently, is now 1 Mbps (and far less overnight). Is this BT trying to push me onto a more expensive service, like they did with my girlfriend?).

[#2]

Your speed has dropped due to the large amount of disconnections on your line. If you pick up the phone is there any noise?
Have you tried any troubleshooting? http://www.plus.net/support/broadband/bbfaults/

[#3]

Assuming that was my graph, no I've got no noise on the line at the moment.

[#4]

Mod Note
Posts split to new thread to aid a resolution.

[#5]

Hi there @edwarne2001,
If you have no noise then you need to raise a dropping connection fault. This can be done here:
http://faults.plus.net
Thank you.

[#6]

Thanks for the reply. I shall start by trying different cables and splitters in my premises before going further.