Trinity Mirror is proposing to make up to another 15 redundancies at the Daily Mirror, Sunday Mirror and Sunday People titles.
Press Gazette understands nine journalism roles look set to go and six administrative editorial support staff.
The last major national press cutbacks at Trinity Mirror’s London-based titles came in October 2015 when 28 production roles were cut.
A further 27 editorial jobs were cut in May 2015 with the closure three national websites and cuts at the Sunday Mirror and Sunday People.
Eight jobs were cut when the Sunday People and Sunday Mirror editorial teams merged in July 2014.
One well-placed source said some editorial insiders are blaming the latest cutbacks on the closure of The New Day in May. Trinity Mirror spent millions launching the new national daily newspaper which closed after two months.
But a management source said this was wide of the mark and that the latest editorial cutbacks were long planned and come as a result of pressure on advertising and circulation revenue.
A Trinity Mirror spokesperson said: “Like all media companies, it is essential that we adapt to the changing industry and ensure we continue to operate efficiently and control costs. An unfortunate but necessary part of this work is identifying savings in editorial budgets, which will include some redundancies at the Mirror. We are now in consultation with those impacted.”
Trinity Mirror national title sales are currently under intense pressure due to price cutting at the Daily Star (currently on sale for 20p).
In May, the average circulation of the Sunday Mirror fell 15 per cent to 777,834 year on year and the Daily Mirror fell 10.4 per cent to 778,650.