EE/Orange/T-Mobile broadband, manage their network for BitTorrent downloading file sharing or peer-to-peer p2p file sharing.
Orange network management
Important services are prioritised over others that are less time-sensitive
(like file sharing)at busy times when a lot of people are connected and our network gets very busy. The busy times are typically between 6pm to 11:30pm on weekdays and 5pm to 11:30pm on weekends.
Our priority is to make sure that everyone has a stable access to the internet at all times; this prioritisation improves the quality and speed of broadband for more than 95% of our customers.
http://help.orange.co.uk/orangeuk/support/personal/b...
http://en.wikipedia.org/wiki/BitTorrent