You will still need to keep your Sky viewing card. If you stop subscribing on a Sky contract, you can keep using that card to watch 5USA, 5* and PICK TV, the so-called "free-to-view" channels. (All ITV channels are free-to-air).
I am currently a sky customer with the full package and a white sky box - I have no aerial and would like to watch TV in my bedroom - could you advise what are my choices ( Ideally would like to be able to pause, rewind and record and use catch up TV but the catch up isn't vital ).
John P: If you have the BT service, as far as I'm aware, you can still watch it online, us the app, etc. As far as other boxes are concerned, I suspect the only other way your going to get it is using a BT PVR (which is basically a Humax). Of course that is Freeview, not Freesat.