LATEST: British comedy star Paul Whitehouse has told a court he had no knowledge his co-star Chris Langham was using child pornography as research for a role. Langham is charged with 10 counts of indecent assault on a girl under 18, as well as 15 counts of making indecent images of a child. His defence team claims he downloaded child pornography for research while writing BBC drama Help. However, his writing partner and co-star Paul Whitehouse told Maidstone Crown Court in England on Tuesday (24Jul07) he never knew Langham was undertaking that kind of research. Prosecutor Richard Barraclough QC asked the Fast Show star, "Did Mr Langham ever discuss with you that he was undertaking any research for the shows?" To which he replied, "Not to my knowledge, no." The trial continues.