Jackmaster's rise to fame was pretty much sealed with his first ever Essential Mix for BBC Radio 1. He's now cheekily bagged himself a three-month residency at XOYO, and we're learning that he's also got quite the address book, based on the acts he's called in as backup. Tonight, the Glaswegian brings dubstep don and Magnetic Man member Artwork along for the ride. Over 18s only. Last guaranteed entry is 11:30pm.