This 1 April 2015 email chain shows Tom Phillips following up with a MailOnline contact after receiving damaging comments about CEN and asking her to help identify MailOnline’s use of CEN material. The document is significant because Phillips asks the contact whether there is any way to search the MailOnline system for “CEN” or for stories supplied by the agency, effectively seeking access to internal publisher records that would not normally be available to a commercial rival. This should be read alongside the earlier MailOnline picture-desk source document and the likely Mirror-source material, because together they show BuzzFeed not only relying on anonymous negative comments from staff at rival publishers, but also encouraging those contacts to supply confidential newsroom or picture-desk information that could be used to build a case against both CEN and the publishers that had used its material. The item is relevant to the wider evidence chain because it shows BuzzFeed still trying to assemble usage evidence through rival-publisher insiders shortly before publication, while its own prior use of CEN material and its unresolved proof gaps remained part of the same investigation.