BT Throttling my Connection?

[NightSt@lk3r]

Ok, here is the story, I've been with BT for years and I've never had any major issues with there service, but as of 2 weeks ago every day between 6:30PM and 10:30PM my internet slows to a crawl and im talking Dial up crawl here.
So is this BT Throttling my connection, if so i will not be a happy chap considering i pay for an unlimited connection.

 

[NightSt@lk3r]

May have just had a problem on your line.....

how would that make my connection slow to a crawl at 6:30PM untill 10:30PM, everyday for the last 2 weeks tho?

And at 6:30PM on the dot this evening as expected it slowed right down.

A download i have going one min was doing 200k+ then the next min i am lucky to get 20k.