In confirmation of earlier speculation, the BBC are indeed running and ARG.
Further to that, it just crossed over with Perplex City:
oth Paul Denchfield and Violet Underground, it turns out, have been chasing the same guy: Cyrus Quinton. A “sound-engineer-slash-mass-murdering-psychopath” as Violet calls him. On May 14th the two ARGs were brought together by the players who notified each of these characters of the other