Cornelia Parker review – ghosts in the machine

Frith Street Gallery, Golden Square and Soho Square, London
Parker depicts the US presidential race as Halloween nightmare. What will she make of the General Election?Last week, Cornelia Parker was named official artist for the forthcoming election. Who knew such preferments existed? Her job, over the next month, is to produce work “about” the election which will then be quietly filed away in the parliamentary art collection, if the last few appointments – figurative artists Da