The gravure site prints 2.7m copies a week of M. Last year it renewed the 4.5m-a-year contract for another three years. The last edition of M will come with the 9 August edition of the Mirror.
Trinity Mirror is also closing The Look, the Mirrors weekly TV listings and entertainment supplement. The Look is printed at Mirror Colour Print in Watford and Oldham.
It is unclear if Trinity Mirror will launch any new supplements to fill the void left by the closures.
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