1000 Revolutions per Moment; Pressure Drop

Hurrah. King's Cross has gone site-specific and promenading. As part of the area's Reveal festival, Periplum theatre have put on 1000 Revolutions per Moment , a night-time musical walk, during which an elderly woman chants a striking love ballad, instrumentalists serenade from balconies, and on a park bench a young woman is glimpsed throwing up into her illuminated handbag. Meanwhile, Mick Gordon has written a play with songs performed by Billy Bragg. The anti-BNP thrust of Pressure Drop isn't exactly surprising, but it's vivaciously scripted ("Barney is not gay. He's just very thin") and punchily acted, particularly by David Kennedy, who bounces on the spot with rage. Cleverly staged by Christopher Haydon, with a peripatetic audience, it's also a model of how spectators can be made to keep moving – in this case by the genially cajoling Bragg – around a building and through a plot.