Yet they operate varying degrees of TM on their various products, incl. usage limits on some and the blocking of outgoing Port 25 SMTP whereas BT doesn't.
How do they manage to implement this?
Do they instruct BTw on how they want to play it? Or maybe they have some online access to BTw's QoS servers?
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC