Grime fans have never been able to get hold of these tracks at full quality, even though they know every bar inside out: from dancing to them in clubs, from mix CDs, or from pirate radio – sure, they're all there on YouTube, scuzzed in tinny digitalia, encoded at a bitrate lower than the temperature of a London winter; or you can pay exorbitant amounts of money to a secondhand vinyl seller, as many desperate DJs have done. But now these lost Ruff Sqwad instrumentals are being made available – and it's a glorious reminder of one of the most creative moments in modern British music.