Are co-headliners as expensive as headliners? - Q&A 9

It's back to the bottomless mailbag to tackle another batch of your probing questions.How much of a band do we listen to before deciding to book them? When will Damnation day ticket be on sale? Will the live shows be recorded?And what's the difference between headlining, co-headlining and are the costs the same or is it all just in the name? Gav and James get stuck in. We go again, every Thursday morning.