Journalists getting nicked are ten-a-penny these days, but this story is disturbing on a whole new level. Ben Leapman, the hack at the heart of the Telegraph’s expenses scandal exposé, has been in court this week on child porn charges. Leapman, who boasted of “my four-year battle for the truth” and was writing for the paper up until he left last month, is accused of publishing obscene articles on internet forums and making indecent photographs of children. Dark…