The crossed hammer-and-sickle insignia of the Bolshevik revolution has a sense of certainty to it. But it’s an old design, and a lot has happened since it first declared the coming triumph of the proletariat. So Marks (2011) the first work you see on entering Frith Street Gallery, has a sort of shock-value to its reworking of the symbol, opening up an idea that had seemed relegated to history. Set into a large mirrored rectangle is an array of red lights in the shape of an exclamation mark (standing in for the hammer) and a question mark (for the sickle), with the two forms lighting up in slow sequence. No longer the herald of the revolutionary momentum of 1917, in the hands of New Delhi-based Raqs Media Collective the hammer-sickle form becomes a brilliantly succinct visual pun, which crystalizes the acute sense of uncertainty that courses through the current turmoil of the global political present. It’s a mix of exclamation and confusion that knows what it rejects but cannot define what it wishes to claim. There’s an urgency in the demands for something new, but what?