From T3.com:

The Cloud launches content Portal across UK transport hubs | T3

Public Wi-Fi provider The Cloud is set to roll out a new content portal in transport hubs across the UK, including the London Overground, which aims to bring Sky News and Sky Sports News to commuters.

The portal will host news stories, images and video footage from both Sky channels, delivering quick and digestible content to users without requiring them to access 3G mobile networks, which can be unreliable, sluggish, and expensive.

In addition, the portal will also host a real-time local and national travel news function, which will pump out up-to-date travel information (including departures) and a Transport For London journey planner.
Funded by advertising although as a Sky customer it would be nice if you were to be able to receive an add free version.