Universe/Timeline:
Marvel Universe
The Resources Control Executive followed STRIKE as the United Kingdom's chief paranormal investigation and control agency. They were heavily involved in the early Warpie activities after the Jaspers Warp, and recruited Betsy Braddock for her ill-fated term as Captain Britain. The RCX was later corrupted by their leader Peter's paranoia, and battled Excalibur for control of Britain's superhumans. In the wake of Black Air and MI-13, the RCX has apparently been dissolved or absorbed back into British Intelligence.