The HeavyTrackerz exploded onto the UK music scene as the production duo behind Meridian Dan's German Whip, one of the most commercially successful grime songs ever. The pair quickly went on to work with the likes of Stormzy (Not That Deep), Wiley, Skepta, Dizzee Rascal and more. The masked duo talk about making the transition from behind the scenes producers to artists in the forefront, the history of grime, and the insane features on their new album, TRKRZ FM.