Art fairs have become ubiquitous in the landscape of the art market. Once you’ve seen one fair, you’ve seen them all: row upon makeshift row of booths desperate to stand out, populated by art that stirs a faint sense of déjà vu and expectant gallerists wielding bottles of champagne. And there’s always a throng of revellers who are there to be seen and those of us waving our press passes as if we matter to the whole circus. But START is different.