British Foreign Secretary Boris Johnson, London’s controversial former mayor and a leading Brexit proponent, met Sunday afternoon with top advisers to President-elect Donald Trump, including Steve Bannon and Jared Kushner.

A Foreign Office spokesperson said the discussions were meant to be “focused on UK-US relations and other foreign policy matters.”

The meeting lasted over 90 minutes.

Johnson is also expected to meet Monday with various Republican leaders in Congress. In Washington, D.C. he’ll gather with House Speaker Paul Ryan, Sen. Bob Corker of Tennessee, who chairs the Senate Foreign Relations committee, and Senate Majority Leader Mitch McConnell.

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The foreign secretary is not expected to meet with Rex Tillerson, Mr. Trump’s pick for secretary of state, protocol dictates they not do so until after the confirmation process.

Tillerson, a billionaire oil executive, is scheduled for a hearing before the Senate on Wednesday.