Guy Haley
Another ex-GW staffer who now writes for Black Library. Guy also ran British sci-fi magazine SFX for a while. After a promising start with books like Skarsnik, Champions of Mars and Crash, Guy has mostly gone for middling Black Library pulp. Because you love that shit. He is also one of the few writers in Black Library to write stories from the perspective of Orks.
Not Ian Watson. He fucking wishes he was.