The Times is experimenting by offering readers in Ireland only the tabloid version from next Monday.
Until now, readers on both sides of the border have only been able to buy the broadsheet Times. The change follows the departure this week of Graham Paterson, who had been in charge of the compact edition. He joined The Times in 1989 and had been foreign editor and home editor.
The Times currently sells 343,118 tabloid copies versus 307,330 broadsheets.
The paper sells 4,757 copies in the Republic of Ireland, but does not publish a separate figure for the north.
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