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British Prime Minister Boris Johnson (right) and Taoiseach Micheal Martin walking in the gardens of Hillsborough Castle during the Prime Minister's visit to Belfast. Picture: Brian Lawless/PA Wire

There were few cool customers in Co. Down today as the sun beat down on the gardens of Hillsborough Castle.

The meeting between Boris Johnson and Micheál Martin had been "warm and engaging", (the former couldn't be helped in 23 degrees), and the men, who have met before, exchanged pleasantries of little note until Sinn Féin's leader in the north Michelle O'Neill asked the Prime Minister about his baby Wilfred, who is now "beginning to verbalize and make noises".