The group, which publishes the DailyMirror, Sunday Mirror, The People, Daily Record and Sunday Mail, as well as 160 local and regional newspapers, has struggled to cope with falling circulations and the transfer of classified advertising to the internet.
In May, the group sacked Richard Wallace and Tina Weaver, the editors of the DailyMirror and Sunday Mirror respectively, and merged the titles into a seven-day operation.