For what it's worth, over the past week I thought my connection was a bit slower than normal, finally got round to doing the speed tests etc and was getting 30mb on wireless downstairs. Im on the 100mb package, i thought this should be better so stated messing with my wifi settings on my laptop. Made it worse. Of course what I should have done was connect right into the router to see what I was getting on the wired connection first to ensure it wa all ok that side. So did that next. To my amazement, I was getting 10mb, yes 10mb, my wired connections were slower than my wireless. Tried different speed test servers, to be sure, didn't make much difference. Ok, so rebooted router, started getting 50mb, better but not ideal, and came to the conclusion i prob ned to get them out to adjust the power levels as someone has mentioned above if there's suddenly been an influx of subscribers to the cab.
Anyway, not got round to phoning them and noticed last night it was dreadful again, back to the 10mb on wired. Logged into my account, and there's this feature now that's there called 'test my line' so i ran this, it said it found a problem and thy will try and fix it and to reboot my router in 10 minutes, ok then, rebooted, back to 50mb like the other night, ran the test again, still said there was a problem, and to reboot again in 10. Did it again, low and behold, I now have 100mb again on wired, and even getting 100mb on wifi in the room next door and has remained stable some 12 hours on.
So doing that may be worth a bash if like me you need to psych yourself up before having to deal with the call centre. I'll update if it goes shit again!