He would use the trip to deliver Brexit demands
The Daily Mail reports that Boris Johnson is considering trips to Berlin and Paris at the end of the month to deliver Brexit demands to Macron and Merkel in person. The report says he would reinforce his commitment to a no deal Brexit and that the trip would keep Brexit from dominating a summit later in Biarritz.
I don't think a face-to-face meeting would change anything but you never know:
"Despite both sides refusing to budge, government sources believe there would be merits to Mr Johnson spelling out the UK's position to the French president and German chancellor personally.
They believe it would hammer home that he is serious about his 'do or die' pledge to deliver Brexit with or without a deal by October 31.
One government source said there would be 'nothing to be lost from delivering that message face to face'.
Meanwhile, the government is thought to have identified September 9 as the date for a potential first Brexit showdown with disgruntled Remain-backing MPs."