mind you isnt BT getting their discovery broadcasting rights from sky
So all service providers will lose discovery 
All major UK pay tv broadcasters make their own contracts with the content providers. And with multiple, viable pay tv providers sky as Sky, BT, Whorehouse, Evil Everywhere and VM, each vying for exclusive content deals, bidding goes up, so subscriptions have to go up, and you get less for it.
As I mostly am interested in films, I gave up (mostly - I do occasionally wobble and subscribe to some services) my Sky years ago, and put the £20pm (that's how long ago it was!) towards DVDs instead.
The streaming providers aren't much cop for films either, as most of the "new" stuff they are putting on now, I bought on DVD 6 months ago... ...we were flicking through Amazon Prime last night trying to find a film, and there new release featured film was Eye in the Sky, which we bought on DVD ages ago, so ended up
watching listening to Hardcore Henry, a really shite, kinda pointless film that will just make you dizzy and ill.