Ockham's Razor's vaunted trilogy pops up every now and again at UK venues and festivals, and if you still haven't caught it then it's worth making the effort. Each of the pieces builds an aerial choreography, and a narrative, around a piece of custom equipment – in Arc a suspended raft made from a grid of scaffolding; in Memento Mori a rigid metal portrait frame; in Every Action... a length of rope run over two pulleys. It's important and influential work, a significant series of pieces in the development of UK contemporary circus, and a fine night of theatre.