Newly appointed British foreign secretary Boris Johnson held his first joint press conference with his American counterpart, secretary of state John Kerry, today (July 19) in London. "We are not going to be in any way abandoning our leading role in European cooperation and participation of all kinds".
As well as the aftermath of the British exit decision, the repercussions of the attempted Turkish coup and the Nice terrorist atrocity are dominating the continent's attention as Prime Minister Theresa May's surprise choice for one of the Cabinet's most high-profile roles takes the helm of British diplomacy.
Theresa May's efforts to forge a close relationship with Washington got off to a bumpy start as USA secretary of state John Kerry appeared to bang his head on the door of Number 10.
Meeting his European Union peers in Brussels for the first time since his shock appointment, the normally ebullient Johnson was on his best behaviour after infuriating them in the Brexit run-up by comparing European Union ambitions for closer integration to Adolf Hitler's.
"What is certainly possible, post leaving the European Union - and once we end our obligations under uncontrolled free movement - it will be possible to have a system of control". Mogherini had originally planned an informal dinner of foreign ministers for Sunday in order to have a post-Brexit de-brief with Philip Hammond, the former foreign secretary-turned chancellor, who had built up a strong working relationship with ministers since succeeding William Hague in the role two years ago.
But Ms Mogherini stressed negotiations could not start on Brexit details until London formally triggered withdrawal under Article 50 of the Lisbon Treaty.
The foreign ministers' meeting was overshadowed by the failed military coup in Turkey and last week's deadly attack in Nice, the third major terror incident in France since 2015.
"This man is a very smart and capable man", Kerry said he learned from a US ambassador in Brussels, a onetime schoolmate of Johnson's at Oxford University.
His Polish counterpart, whose conservative nationalist government has defied Brussels in a drive to shackle the constitutional court, said Johnson had made some "conciliatory gestures".
French Foreign Minister Jean-Marc Ayrault has gone on record to say that Johnson "lied a lot" during the Brexit referendum campaign in which United Kingdom voters narrowly voted to exit the EU.
"We talked particularly about efforts to try to deal with counter-terrorism, the importance of our co-operation continuing".