MediaGuido understands the Guardian has launched an internal investigation after it emerged its original “traingate” news report was written by a Trot under a pseudonym. Private Eye found that “Charles B. Anthony”, who had the byline for the fictitious story about Corbyn sitting on the floor, was in fact a former Socialist Workers Party member called Anthony Casey. Somehow they published the news report filed by this Corbynista freelancer, which turned out to be a pack of lies. The Guardian readers’ editor is now investigating how their editorial integrity was rather embarrassingly breached. “Facts are sacred”, after all…