A group of senior BBC executives are campaigning to introduce a BBC-wide ban on actors, writers and other talent involved in its productions using social networking sites such as Twitter to disclose details of their work.
According to senior sources, the need for a ban "was a widely held view" and "conversations have started" regarding a change to contracts to forbid talent from using Twitter and other public internet forums to discuss details of their involvement in BBC productions if the information is confidential or sensitive.