So far it appears BT are throttling torrent uploads if there is heavy demand in that area, and of course traffic managing due to demand. 300 gig is the fup as said by plenty, but this includes uploads. The times of completely unthrottled and/or traffic managed internet use in the uk are heavily numbered as even the usual players with unlimited packages are reducing fup's or traffic managing. I believe there is still a demand for it, but it will cost you!