It is spelt out by Orange they manage their network, BitTorrent downloading is 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.
20 Mbps. Sync 11864 kbps Downstream, 1189 kbps Upstream.
ADSL2+ wireless N Router supplied by Orange
BT Business Hub 2Wire 2700HGV
v2 ADSL2+ Dual SSID wireless Router