Sky Mobile is launching in Mid-December for Existing Customers, then will launch for wider public in the next year. Apparently it plans to fix all problems that current phone contracts have right now. They will offer shared plans for families which will supposedly save £500 a year. All unused data can be saved up from previous months and used later.
Plans start from £10 - £20 Monthly
£10 - 1GB Data
£15 - 3GB Data
£20 - 5GB Data
Plans only offer Data, Calls/Texts cost 10p a Minute
Unlimited Calls and Texts for Existing Customers with a Sky TV Package
More Details - https://www.uswitch.com/mobiles/news/2016/11/sky-mobile-launching-mid-december-with-unlimited-data-rollover-and-flexible/