The union said 19 jobs could be lost if Glasgows library and copy-taking ability is scaled down, but the company said there would be around 10 redundancies.

The GPMU has informed Daily Record & Sunday Mail that its members are prepared to strike. Although the chapel at the administrative centre is unconnected with Trinity Mirrors printing plant in the city, production could be affected.

GPMU national officer Chris Harding confirmed that Trinity Mirror plans to move production of the Mirror in Northern Ireland from Derry to Belfast with the loss of 24 jobs. Trinity Mirror has also announced plans to sell its regional titles in Belfast, Derry and Donegal.

I think that it might have implications for whether they can sell the plants. It means that they [Derry] have lost two shifts, said Harding.

Harding said that although there were no firm plans or numbers for the amount of job cuts from Trinity Mirror chief executive Sly Baileys review, the plants at Watford and Oldham had introduced a no replacement policy.

Last week Bailey said she wanted to increase the profitability of the group by cutting 550 jobs across the board.