The connection speed is at its lowest point in the afternoons (when most people are on it)
The internet is barely useable, it takes around 2 minutes of buffering to even load a youtube video in HD. Trying to play an online game is near impossible as my ping is usually 500+, it once got as high as 1100.
Welcome to the forum and sorry to hear you're getting slow speeds. From what you describe this certainly sounds like peak time contention. I've just checked your connection and I'm afraid this is the case. The fault number for the upgrade work is F003368525 and the review date is 02/09/15. I'd suggest bumping this thread nearer that date and we'll check for further updates for you.