It’s not often that a venue’s stage door is easier to find than its main entrance, but The Old Vic Tunnels is one such location. For those behind Coming Up Later, however, this is all part of the fun of a three-evening underground festival featuring a rather wonderfully haphazard range of performances. The event is the product of The Old Vic’s outreach programme, Old Vic New Voices, and the funding and artistic crowd-sourcing network IdeasTap.com. Such collaboration resulted in an opportunity few emergent creative directors could ignore: a production team, a budget to play with and three expansive tunnels for those who could imagine how best to use them.