They had it last year too, between 3 and 4 pm.

I've been told beer will be cheaper until 6pm. Anyone can confirm?   Not like i'll drink more than 1-2 in 38 C degrees.

This!   Biffy Clyro I don't think would ever get asked, I just don't think it us their scene and it certainly wouldn't be a wise move for them after how the Finsbury Park show went. If they ever had a chance of regaining or staying a bit higher up taking Slam Dunk isn't how you do it. For the cost of it now I think being into the main headliner does make a difference though. 

Sabrina I actually think is alright, but as an overall thing including Fontaines in the mix it does look very boring. 

I went to the O2 show as had cheap NHS tickets. I did love the whole Machine Gun Kelly vs MGK Emo/Pop Punk stuff amusing and could see that show going down well. I thought it was so funny watching the video skits of a die hard old skool fan gradually morphing in to an Emo Kid. That show with less old Machine Gun Kelly tunes and more MGK Pop-Punk would be ace.   Pair him against a heavy act on the other stage and jobs a goodun,