I've just found this NowTV Sky Cinema deal for Xbox One users.
You can get 3 months of Sky Cinema for just £3 (normally £9.99 pm so £29.97 in total).
The special offer can be had by creating an account (click link), installing the NOW TV app on the Xbox, and entering your code.
It's only for 18+ though, but it says "YOU CAN CANCEL AT ANY TIME".
Valid until 2nd October, which if you get it takes you right up until end of the year - perfect for Christmas blockbusters!
Good deal for Xbox fans - another way to get it is with a Chromecast.