Line speed dropped from 24 to 14

[#1]

I have had fibre for over a year now but just lately my speed has dropped from a pretty steady 24 mbps to 14mbps. Nothing has changed at my end and it's beginning to drive me bonkers!

[#2]

@su4stu
You need to start here http://community.plus.net/forum/index.php/topic,143836.0.html and then go to here http://faults.plus.net/ to log a fault.

[#3]

I had exactly that, I logged a fault a engineer came out spent 45 minutes checking my line.
He found no obvious fault but clearly did something as immediatly my speed went from 13 to 18, further " tweaking" by PNet and I have been running at a steady 30 for months now.

[#4]

Your line is in sync at 23Mbs, so I'd expect a bit more on speedtests than 14Mbps. Testing your broadband is saying that there's a potential phone fault, however testing your phoneline itself shows no fault.
Is there any noise at all on the phone line?