Hi afriman, so as from yesterday my line is finally with you. My speedtests were better when I got home, showing a solid 8.5mbps... so I went out and came back and tested at 10ish again... WHAM... got three tests showing 1.7 mbps on my 10 mbps line. Tested the line using Clientzone and EVERYTHING as green with good stats... tested this morning again and back up to 8.4 mbps... eish... why the massive fluctuations?
This is very strange indeed
Please drop me a PM with your info and I'll see if I can spot anything. Did you run a traceroute at the times you noticed the slower speeds?