Submitted in response to written requests from the Inquiry, usually providing lists of questions to be answered. In most cases these formed the basis of questioning in public sessions, but in some cases they were read into the record (or taken as read) and the witness did not appear in person.
Given by witnesses invited by the Inquiry, normally after they have made written statements. These sessions could be viewed live online and sometimes on television news services, and the video recordings are part of the archive. The statements were usually released to the public after the public sessions.
Writer and former journalist at the Sunday Mirror, Clarkson left the tabloid world in 1987 and has since written several true-crime novels and featured in documentaries about the criminal gangland and underworld. Told the Inquiry that he had never used private investigators. When he was working as a journalist, he said, reporters had openly talked to the police and would probably pay around £50 to a policeman for "help" with a story.