I just read in The Sun at the chinese takeaway over the road that police have had to subdue a "hammer-wielding maniac" with CS gas on a Central Line train at Chancery Lane. I'm not sure what exactly was going on, there was only a paragraph and a photo in the Sun, but there's nothing on BBC News or TfL, so perhaps this is being hushed up? I don't know really - anybody have any more info?