The Prime Minister will go to Belfast on Monday to meet with Sinn Fein vice president Michelle O’Neill. Mr Johnson’s visit comes as the DUP refuses to join the executive.
Ms O’Neill told reporters she was expecting the Prime Minister in Northern Ireland on Monday.
She said she will tell Mr Johnson to “stop pandering to the DUP” amid the power sharing row.
Downing Street has not yet confirmed Mr Johnson will be visiting Northern Ireland.
It is understood he will focus on talks with the Northern Irish parties to try to get power-sharing arrangements back on track.
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