What does a festival promoter do when a large chunk of its audience has moved on from wanting to watch their heroes in a muddy field?

For Kilimanjaro Live, the answer was simple – move the festival indoors.

Out of that premise has come the Stone Free Festival, which debuts at The O2 over two days this weekend. A partnership between Kili and the London venue, it is headlined by Alice Cooper and Rick Wakeman.

Other acts include The Darkness, ...