UPDATE: Walmart in the US has now opened up preorders for the digital combo. They are the first retailer to do so.
The Xbox Ahead Program, announced for Call of Duty: Ghosts, is now available for preorder at Amazon UK. This ahead program offers a disc-less dual license which entitles you to the Xbox 360 and Xbox One digital version of the game for $69.99 or £60.99. The item will release on November 5th. On that day you will be able to download the Xbox 360 version, and then on Nov. 22nd you will be available to download the Xbox One version.
Preorder now here. (Thanks @LiamFTWinter)