Matt, do you have anymore information on how you can do that?
I called up last week to cancel Sky Sports and Premier, 30 days notice (understandable) for a 17 quid reduction on a £114 bill.
Don't see anything online in my account reflecting the changes yet (could be the 30 days thing?) and no further options to amend packages. It annoys the hell out of me that these things can't be changed online as a matter of course (regardless of the current situation).