The significance of Bloomfield's endorsement is structural, not symbolic. Shadow ministerial backing transforms the extinction-risk argument from activist pressure into a formal opposition position — one that now appears in parliamentary debate rather than only in campaign materials [1]. The government's stated preference for voluntary frameworks and pro-growth AI policy now faces a named, numbered bloc of legislators who have formally rejected that framing. Starmer's promise to will be tested against 100 colleagues who consider the current pace inadequate for the risk they have identified.…