I have been with Sky throughout my IVA and am still with them. I chopped and changed packages all the time with no problems (but, of course, I was an existing customer). You can only try ---- by all accounts their acceptance criteria seem to vary according to their targets !!!
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk
I tried to change my internet and broadband from Sky to Talktalk last week for a cheaper deal and we were declined due to not passing credit checks.... I didn't even think about that when I applied....
I was with Sky as well - never had any problems and with O2 for my mobile. No problems.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk