Premium offers access to four Battlefield Hardline expansion packs - Betrayal, Getaway, Robbery and Criminal Activity - each introducing new maps, modes, weapons and vehicles. Robbery is currently also available free of charge to all Xbox Live Gold subscribers.
Battlefield Hardline was added to EA Access last October, meaning subscribers now have access to the original game plus all of its DLC. A subscription to EA/Origin Access costs £3.99 per month, with an annual £19.99 option available exclusively on Xbox One.
The next Battlefield game, meanwhile, is due to be revealed this Friday, May 6.
Source: xbox.com, origin.com (thanks @Holo_drone)