Sorry to say that but I think that The trouble with French and particularly Parisian Style is that is very chic... indeed, but the chic-ness required to dress a certain way so french people are used to dress well because they all dress the same. Many people identify each other with the clothes of the particular brand they have ie the gerard darel bag, vanessa bruno bag, the comptoir des cotonniers clothes, the bensimon shoes. Most of French girls style is easy to identify. First because French girl have a specific natural allure (very thin, long straight hair with sometimes a but of volume, the ray on the side, and a certain allure when they wear simple clothe ie : skinny + large blouse ) and the thing is most of people try to have that "french allure" so french girls mostly wear the same clothes in the same brand
Whereas British people are very open-minded, the british style is determinated by the whole outfit whatever the brand you wear and moreover, there're a large diversity of style and they really do not care of what you wear. You say "that girl/boy have a great style" because his whole outfit including his hair color, the haircut, the way the haircut and the face's shape fit together is great not because you recognize that cloth cost $$$ and you bought it in a certain brand.
And sorry french people, I came back from a trip in London and the very last trend start in London, not in France (I thought, in the beginning that it was in France but I was mistaken)