Just extra content you access via the red button on your remote in the UK. They use it for the Olympics and mass events where they need extra channels to put content.
It's also live on the website (probably geoblocked).
Anyone know if the red button stuff is in HD? Don't want to be watching Bruceys Boys getting humiliated in poor quality....
Looks like it's SD only. If you can get iPlayer on your TV you're probably better off watching it that way, it'll be slightly behind time but quality will be much better.
Cheers, it's just started and yes, it's in SD on the red button.