The ultimate guide to Freesat

Instead of launching a whole channel for HD, ITV is using a red-button application, so users with an HD box can switch to the hi-def stream when it's available. This also means that ITV HD will be exclusive to Freesat for some time, although Sky has said it's keen to have access for Sky HD owners – presumably because of the sheer dearth of HD content currently.

Channel 4 HD has no plans to join Freesat while it's still at an experimental stage, and Five doesn't have an HD channel.