Fleet Street insiders fear a "domino effect" of more arrests as the Met Police Operation Elveden inquiry into corruption spread beyond News International to Trinity Mirror.

Up until last week all 18 journalists arrested by Elveden were connected to the Sun and targeted as a result of the actions of News Corp’s own Management and Standards Committee.

Last Wednesday saw the arrest of 37-year-old Grieg Box Turnbull who left the Mirror after eight years in March but who still freelanced for the paper. A 46-year-old prison worker and a 50-year-old woman were also arrested.

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