It was reported this morning that executives at the publishers, including chief executive Sly Bailey, were considering the plan, which was mothballed last year after objections from then Daily Mirror editor Piers Morgan.
It was further reported that the arrival of new editor Richard Wallace, who replaced Morgan when he was sacked following the fake Iraqi prisoner fake photo abuse scandal, has reopened the door to the move.
However, a Trinity Mirror spokesman said: "We have absolutely no plans to merge staff on the Daily and Sunday Mirror into a seven-day operation." He also denied that the seven-day operation was ever an option.
A source at the company added: "The only place this has been considered is in media gossip."
The first seven-day operation, a merger of the Daily and Sunday Express titles in 1996, was widely seen as a failure, with the move being scrapped after just two years.
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