I have a Humax 2100 connected to my BT broadband. If I order BTTV can I just watch the channels on this box? I can see them all but am obviously not subscribed.
You can, but you will be required to order either the basic YouView non-recordable box, or the YouView+ box.
You could opt for the non-recordable one, as that may allow you to use your retail box.