london british government need provide clarity less ambiguity brexit negotiations succeed french junior economy minister benjamin griveaux say visit london wednesday ask impact no-deal brexit scenario would france griveaux tell reporters would felt whole europe would even bad britain go wrong go wrong everyone say griveaux help president emmanuel macron set en marche political movement propel power may part 39-year old leader inner circle london meet company executives predominantly financial service industry view persuade move operations france brexit griveaux decline give detail potential corporate move say company make announcements plan griveaux say confident paris minor financial center dwarf london decades would prominent future five 10 years paris first financial place continental europe say london remain important major financial place sure give us clarity brexit french minister griveaux tell uk