This is a Brexit term and I want to read French sources and opinion on the subject that it identifies.
closed as unclear what you're asking by Laurent S., Toto, Dimitris, Stéphane Gimenez♦ Sep 1 '18 at 22:09
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
"frein d'urgence" as used in this article, nouvelobs.com
looks like the handbrake. "frein à main". to suggest a strong opposition we often use figuratively: "X à provoqué une levée de bouclier"