The Brexit clock is now deafening, and the British political and media establishments seem utterly consumed by its inexorable, relentless ticking. In the public realm, little else is considered, even less discussed. And yet, despite this obsession, with just 42 days before Britain departs the European Union, negotiations for a withdrawal agreement remain in deadlock, and the hopes of breakthrough seem to be fading. At the core of the dispute is the Irish backstop and, by proxy, participation in a customs union.